pax_global_header00006660000000000000000000000064126415435760014527gustar00rootroot0000000000000052 comment=e4458c1b173e5f4acabe8a3a37d751c9470afef9 java-design-patterns-1.9.0/000077500000000000000000000000001264154357600155645ustar00rootroot00000000000000java-design-patterns-1.9.0/.gitignore000066400000000000000000000002111264154357600175460ustar00rootroot00000000000000target .metadata .settings .classpath .project *.class # Package Files # *.jar *.war *.ear .idea *.iml *.swp datanucleus.logjava-design-patterns-1.9.0/.travis.yml000066400000000000000000000007221264154357600176760ustar00rootroot00000000000000language: java jdk: - oraclejdk8 env: global: - GH_REF: github.com/iluwatar/java-design-patterns.git - secure: LxTDuNS/rBWIvKkaEqr79ImZAe48mCdoYCF41coxNXgNoippo4GIBArknqtv+XvdkiuRZ1yGyj6pn8GU33c/yn+krddTUkVCwTbVatbalW5jhQjDbHYym/JcxaK9ZS/3JTeGcWrBgiPqHEEDhCf26vPZsXoMSeVCEORVKTp1BSg= before_install: - export DISPLAY=:99.0 - sh -e /etc/init.d/xvfb start after_success: - mvn clean test jacoco:report coveralls:report - bash update-ghpages.sh sudo: false java-design-patterns-1.9.0/CODE_COVERAGE.md000066400000000000000000000007251264154357600200770ustar00rootroot00000000000000# Code Coverage Report generation To generate the code coverage report, execute the following command: > mvn clean verify This will generate code coverage report in each of the modules. In order to view the same, open the following file in your browser. > target/site/jacoco/index.html Please note that the above folder is created under each of the modules. For example: * adapter/target/site/jacoco/index.html * busniess-delegate/target/site/jacoco/index.html java-design-patterns-1.9.0/CONTRIBUTING.MD000066400000000000000000000003161264154357600177150ustar00rootroot00000000000000This is great you have something to contribute! Before going any further please read the [wiki](https://github.com/iluwatar/java-design-patterns/wiki) with conventions and rules we used for this project. java-design-patterns-1.9.0/LICENSE.md000066400000000000000000000020721264154357600171710ustar00rootroot00000000000000The MIT License (MIT) Copyright (c) 2014 Ilkka Seppälä Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. java-design-patterns-1.9.0/README.md000066400000000000000000000070321264154357600170450ustar00rootroot00000000000000 # Design patterns implemented in Java [![Build status](https://travis-ci.org/iluwatar/java-design-patterns.svg?branch=master)](https://travis-ci.org/iluwatar/java-design-patterns) [![Coverage Status](https://coveralls.io/repos/iluwatar/java-design-patterns/badge.svg?branch=master)](https://coveralls.io/r/iluwatar/java-design-patterns?branch=master) [![Join the chat at https://gitter.im/iluwatar/java-design-patterns](https://badges.gitter.im/Join%20Chat.svg)](https://gitter.im/iluwatar/java-design-patterns?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge) # Introduction Design patterns are formalized best practices that the programmer can use to solve common problems when designing an application or system. Design patterns can speed up the development process by providing tested, proven development paradigms. Reusing design patterns helps to prevent subtle issues that can cause major problems, and it also improves code readability for coders and architects who are familiar with the patterns. # Getting started Before you dive into the material, you should be familiar with various [Programming/Software Design Principles](http://webpro.github.io/programming-principles/). All designs should be as simple as possible. You should start with KISS, YAGNI, and Do The Simplest Thing That Could Possibly Work principles. Complexity and patterns should only be introduced when they are needed for practical extensibility. Once you are familiar with these concepts you can start drilling down into patterns by any of the following approaches - Using difficulty tags, `Difficulty-Beginner`, `Difficulty-Intermediate` & `Difficulty-Expert`. - Using pattern categories, `Creational`, `Behavioral` and others. - Search for a specific pattern. Can't find one? Please report a new pattern [here](https://github.com/iluwatar/java-design-patterns/issues). # How to contribute If you are willing to contribute to the project you will find the relevant information in our [developer wiki](https://github.com/iluwatar/java-design-patterns/wiki). We will help you and answer your questions in the [Gitter chatroom](https://gitter.im/iluwatar/java-design-patterns). # Credits * [Effective Java (2nd Edition)](http://www.amazon.com/Effective-Java-Edition-Joshua-Bloch/dp/0321356683) * [Java Generics and Collections](http://www.amazon.com/Java-Generics-Collections-Maurice-Naftalin/dp/0596527756/) * [Let's Modify the Objects-First Approach into Design-Patterns-First](http://edu.pecinovsky.cz/papers/2006_ITiCSE_Design_Patterns_First.pdf) * [Pattern Languages of Program Design](http://www.amazon.com/Pattern-Languages-Program-Design-Coplien/dp/0201607344/ref=sr_1_1) * [Presentation Tier Patterns](http://www.javagyan.com/tutorials/corej2eepatterns/presentation-tier-patterns) * [Functional Programming in Java: Harnessing the Power of Java 8 Lambda Expressions](http://www.amazon.com/Functional-Programming-Java-Harnessing-Expressions/dp/1937785467/ref=sr_1_1) * [Patterns of Enterprise Application Architecture](http://www.amazon.com/Patterns-Enterprise-Application-Architecture-Martin/dp/0321127420) * [Spring Data](http://www.amazon.com/Spring-Data-Mark-Pollack/dp/1449323952/ref=sr_1_1) * [J2EE Design Patterns](http://www.amazon.com/J2EE-Design-Patterns-William-Crawford/dp/0596004273/ref=sr_1_2) # License This project is licensed under the terms of the MIT license. java-design-patterns-1.9.0/abstract-factory/000077500000000000000000000000001264154357600210345ustar00rootroot00000000000000java-design-patterns-1.9.0/abstract-factory/.gitignore000066400000000000000000000000111264154357600230140ustar00rootroot00000000000000/target/ java-design-patterns-1.9.0/abstract-factory/etc/000077500000000000000000000000001264154357600216075ustar00rootroot00000000000000java-design-patterns-1.9.0/abstract-factory/etc/abstract-factory.png000066400000000000000000000522141264154357600255710ustar00rootroot00000000000000PNG  IHDR*8J}Y+3 lZZd4pC2^zW-b)n][HʑQŠƷ[ka-ZX k9a- f`> `XMk[~޳r*}4m- l\+NSeFF QL4-ZX ka-m- f`^ 3Z-XSY=D{4\ b?QN3^W.Yldf} ZX ka-갵0sf̨jZL)1j;~<{q^ϛz!ap#YWtlZX ka-mka0f̜jZ)&yD`itZ'3mES#Y}e`-ZX ka-''a0 ki-k|qpJ5Hs+V6̫\ldȲnu-ZX ka-3&lrZO$7rOJt=4?ܒL#,2uKO+% I̤i| ZX ka-eZ a kaeq 5*iB&a-IX l4 k!MIX iB&a-Ԃ$4"P&a-IX iBP fH$O>@A&a-IX iB-!MZH(?(iB&a-IX l4 k!MIX iB&a-Ԃ$4"P&a-IX iBP fH${O?gv~moï>&rC~ jA~ZB)aP8qi-vZ=Yh3M kb'=tۿ&vo/~o{o?sG M:a/xv} yUj^cTg~7kU++ZqԭFsqf-Gފ겵| f̪[A7乵/C}'5r=@6[U[t'*n<6!ILgkL=ֳs矸|gm!1͇?vSxc5'tPݩR2KvgvdaU &*Pstvef^Y1տA1p[z^C;~Z5ln3NtlUpO˽JhڊӔLmf̪?Lڏ7Ǧ')l-z7ˏ ?gh_yg\}ѽ?Z}7<*)Oiڲu=߼ Zݙka07 f0kZXkMZIqE.O&s@I-s#_ŻP#[<\x 3-bygQ 2o o5ZX ka-Y 9j0l3Z-X4Yz'FfkwꩶQ&n@9&O+k|٪664c#}_[ka-ZX kd- s`X k`-z?}OʍQ1\?r . eRDf%϶m$[8;h4;Z(X ka-ZXK0f9a-ՂfSܒK.uiq'*^xYpI=WWdX4}z 8f,Rzқ4PZX ka-Fka07 f0kZXk5今^VÝ:Θ8 }K-'fg]ʕJ Χ5.]]v[+Y؀yQ gn]`-ZX ka-`>a0 V ֪(?jvT˦@AB&a-IX iUBa3H0IY;0K;($4 k!MZH  "&n-O@A&a-IX iB-!MZH(?(iB&a-IX l4 k!MIX iB&a-Ԃ$4"P&a-IX iBP fH$uȑ]5&X}hk&hkA `3M֢/QFz&a-IX iB-!MZHz\|IX iB&a-Ԃ$4"P&a-IX iBP fH$O>@A&a-IX iB-!MZH'6L4@X 4@X Z&h[lGX iB&a-Ԃ$4w@A&a-IX iB-!MZH(?(iB&a-IX l4 k!MZt3;_K͢ Ʞ$4 k!MZa3IX iҢ姓p_/o͢N ꢰ$4 k!MZa3IX iR3'0 ꖰ$4 k!MZa3IX ihxJk2px+LF7FY[ %ie Ý vd 6e_8RW5Wj7}d |RO]:UtfkZ]Ԋ5- GugWqZEW5S+fsf5"hkZ+ԂgMz2}*]I_!㽛L3_8M: 5#_<ա@wEkFfӬZkM<~w>ZplUkNDWG4]4誵mK-y7ajy+xZpű0F)?=}=ڪ8,k@$Kv"U׎IA'Y(SfAEЙw"fZMVfŎ}I uZ fӯZhjIr"sUkYZ0C6lQLPNqC]֢ga67};{Rræ˸`GܤxOU': G_]~/vFvJMk%%$1_徻fZMְz3 ŷ]m@Zj7H̆Oh@uff+{MU'YklXʏL1?L}&?Ҥߏu'e_e‡(i)L_碫ֲ*06+)hƐx躺j k?ι/dS~Kɭ: _2EModad遢 )c65gjMG?fivGb'YklXʌ,j'_j]U՟ròd{誵lK-J2{osp uuZ &fkZO~'DωlSŗA4*'U2J/7{g`-_̆IϛRY1S@A&a-IX iB-!MZHLv^J_ KWRKӁL k-CRXkrZ*zlޘ)Ιm7i^ay6>֪)mƗIaw(R|i ;ˆ ^X 0@Z k-,ZXXKZAͲҒ7e۵&a-eduf|9Z/ZuOzC*KÑjFuTq _PKl.VւZeꪵL.:gɺeL[lvmIX kc-Y]_ k-(UO|ǯ W//3HUN$۷䗄ܼee0dwpNdXdb-Mwp0Hfl%@ZX ka-tkU,;юb=;ٶ )Ε RPn].vֲZ_|9b-{_uY# ,;zٍ@NZFPh{eZX ka-{Ukvx;{y]Z{*9[\jKmҌs#y. 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K0ü44F/o:AuOϟoHm[ǏÑmXl綇9V vpA 9](B T-3gҥ3N`rcS-=ݯAn+.~Р4΄ CmmP,ێOz K#XV-u{<3gMMQݫܦrY vCn1*(N?nIغ%0j mTՠl re.o^ncFo ؆UX!ܞri;3?ںJIDib2Zޝr NGpW`k]ïߎɿx毾FbCnV`sڵ>>.K9A6'u3N}7JKyLnKM1ٰ6(uʔQ;v|C9[۩3f|`uux=X"mnWϥg֬t<իn>Li\fk"::ZPcJƏR]0zh }ϤzQ%=ݏUF ؃UX!Fl,)SF%%-/AL__[]Bs[~~z6mQ|ZWIoTefZ|رzvv/Iᬢ˗TٺuY]m6 ~OZVk6٣_>55%% Z*+/ jAn 6*@nCn*@nCn*@nCn*kERUcXmp @԰ +ې@ +ې@ +ې@ + zV`rrV`rrV`rrV`~ r]`m @:?8ܢIENDB`java-design-patterns-1.9.0/abstract-factory/index.md000066400000000000000000000022541264154357600224700ustar00rootroot00000000000000--- layout: pattern title: Abstract Factory folder: abstract-factory permalink: /patterns/abstract-factory/ categories: Creational tags: - Java - Gang Of Four - Difficulty-Intermediate --- **Also known as:** Kit **Intent:** Provide an interface for creating families of related or dependent objects without specifying their concrete classes. ![alt text](./etc/abstract-factory_1.png "Abstract Factory") **Applicability:** Use the Abstract Factory pattern when * a system should be independent of how its products are created, composed and represented * a system should be configured with one of multiple families of products * a family of related product objects is designed to be used together, and you need to enforce this constraint * you want to provide a class library of products, and you want to reveal just their interfaces, not their implementations **Real world examples:** * [javax.xml.parsers.DocumentBuilderFactory](http://docs.oracle.com/javase/8/docs/api/javax/xml/parsers/DocumentBuilderFactory.html) **Credits** * [Design Patterns: Elements of Reusable Object-Oriented Software](http://www.amazon.com/Design-Patterns-Elements-Reusable-Object-Oriented/dp/0201633612) java-design-patterns-1.9.0/abstract-factory/pom.xml000066400000000000000000000011611264154357600223500ustar00rootroot00000000000000 4.0.0 com.iluwatar java-design-patterns 1.9.0 abstract-factory junit junit test java-design-patterns-1.9.0/abstract-factory/src/000077500000000000000000000000001264154357600216235ustar00rootroot00000000000000java-design-patterns-1.9.0/abstract-factory/src/main/000077500000000000000000000000001264154357600225475ustar00rootroot00000000000000java-design-patterns-1.9.0/abstract-factory/src/main/java/000077500000000000000000000000001264154357600234705ustar00rootroot00000000000000java-design-patterns-1.9.0/abstract-factory/src/main/java/com/000077500000000000000000000000001264154357600242465ustar00rootroot00000000000000java-design-patterns-1.9.0/abstract-factory/src/main/java/com/iluwatar/000077500000000000000000000000001264154357600260765ustar00rootroot00000000000000java-design-patterns-1.9.0/abstract-factory/src/main/java/com/iluwatar/abstractfactory/000077500000000000000000000000001264154357600312715ustar00rootroot00000000000000java-design-patterns-1.9.0/abstract-factory/src/main/java/com/iluwatar/abstractfactory/App.java000066400000000000000000000057511264154357600326640ustar00rootroot00000000000000package com.iluwatar.abstractfactory; /** * * The Abstract Factory pattern provides a way to encapsulate a group of individual factories that have a common theme * without specifying their concrete classes. In normal usage, the client software creates a concrete implementation of * the abstract factory and then uses the generic interface of the factory to create the concrete objects that are part * of the theme. The client does not know (or care) which concrete objects it gets from each of these internal * factories, since it uses only the generic interfaces of their products. This pattern separates the details of * implementation of a set of objects from their general usage and relies on object composition, as object creation is * implemented in methods exposed in the factory interface. *

* The essence of the Abstract Factory pattern is a factory interface ({@link KingdomFactory}) and its implementations ( * {@link ElfKingdomFactory}, {@link OrcKingdomFactory}). The example uses both concrete implementations to create a * king, a castle and an army. * */ public class App { private King king; private Castle castle; private Army army; /** * Creates kingdom */ public void createKingdom(final KingdomFactory factory) { setKing(factory.createKing()); setCastle(factory.createCastle()); setArmy(factory.createArmy()); } ElfKingdomFactory getElfKingdomFactory() { return new ElfKingdomFactory(); } OrcKingdomFactory getOrcKingdomFactory() { return new OrcKingdomFactory(); } King getKing(final KingdomFactory factory) { return factory.createKing(); } public King getKing() { return king; } private void setKing(final King king) { this.king = king; } Castle getCastle(final KingdomFactory factory) { return factory.createCastle(); } public Castle getCastle() { return castle; } private void setCastle(final Castle castle) { this.castle = castle; } Army getArmy(final KingdomFactory factory) { return factory.createArmy(); } public Army getArmy() { return army; } private void setArmy(final Army army) { this.army = army; } /** * Program entry point * * @param args * command line args */ public static void main(String[] args) { App app = new App(); System.out.println("Elf Kingdom"); KingdomFactory elfKingdomFactory; elfKingdomFactory = app.getElfKingdomFactory(); app.createKingdom(elfKingdomFactory); System.out.println(app.getArmy().getDescription()); System.out.println(app.getCastle().getDescription()); System.out.println(app.getKing().getDescription()); System.out.println("\nOrc Kingdom"); KingdomFactory orcKingdomFactory; orcKingdomFactory = app.getOrcKingdomFactory(); app.createKingdom(orcKingdomFactory); System.out.println(app.getArmy().getDescription()); System.out.println(app.getCastle().getDescription()); System.out.println(app.getKing().getDescription()); } } java-design-patterns-1.9.0/abstract-factory/src/main/java/com/iluwatar/abstractfactory/Army.java000066400000000000000000000001761264154357600330500ustar00rootroot00000000000000package com.iluwatar.abstractfactory; /** * * Army interface * */ public interface Army { String getDescription(); } java-design-patterns-1.9.0/abstract-factory/src/main/java/com/iluwatar/abstractfactory/Castle.java000066400000000000000000000002021264154357600333410ustar00rootroot00000000000000package com.iluwatar.abstractfactory; /** * * Castle interface * */ public interface Castle { String getDescription(); } java-design-patterns-1.9.0/abstract-factory/src/main/java/com/iluwatar/abstractfactory/ElfArmy.java000066400000000000000000000003661264154357600335000ustar00rootroot00000000000000package com.iluwatar.abstractfactory; /** * * ElfArmy * */ public class ElfArmy implements Army { static final String DESCRIPTION = "This is the Elven Army!"; @Override public String getDescription() { return DESCRIPTION; } } ElfCastle.java000066400000000000000000000003761264154357600337250ustar00rootroot00000000000000java-design-patterns-1.9.0/abstract-factory/src/main/java/com/iluwatar/abstractfactorypackage com.iluwatar.abstractfactory; /** * * ElfCastle * */ public class ElfCastle implements Castle { static final String DESCRIPTION = "This is the Elven castle!"; @Override public String getDescription() { return DESCRIPTION; } } java-design-patterns-1.9.0/abstract-factory/src/main/java/com/iluwatar/abstractfactory/ElfKing.java000066400000000000000000000003661264154357600334600ustar00rootroot00000000000000package com.iluwatar.abstractfactory; /** * * ElfKing * */ public class ElfKing implements King { static final String DESCRIPTION = "This is the Elven king!"; @Override public String getDescription() { return DESCRIPTION; } } ElfKingdomFactory.java000066400000000000000000000005261264154357600354270ustar00rootroot00000000000000java-design-patterns-1.9.0/abstract-factory/src/main/java/com/iluwatar/abstractfactorypackage com.iluwatar.abstractfactory; /** * * ElfKingdomFactory concrete factory. * */ public class ElfKingdomFactory implements KingdomFactory { public Castle createCastle() { return new ElfCastle(); } public King createKing() { return new ElfKing(); } public Army createArmy() { return new ElfArmy(); } } java-design-patterns-1.9.0/abstract-factory/src/main/java/com/iluwatar/abstractfactory/King.java000066400000000000000000000001761264154357600330300ustar00rootroot00000000000000package com.iluwatar.abstractfactory; /** * * King interface * */ public interface King { String getDescription(); } KingdomFactory.java000066400000000000000000000003071264154357600347750ustar00rootroot00000000000000java-design-patterns-1.9.0/abstract-factory/src/main/java/com/iluwatar/abstractfactorypackage com.iluwatar.abstractfactory; /** * * KingdomFactory factory interface. * */ public interface KingdomFactory { Castle createCastle(); King createKing(); Army createArmy(); } java-design-patterns-1.9.0/abstract-factory/src/main/java/com/iluwatar/abstractfactory/OrcArmy.java000066400000000000000000000003641264154357600335130ustar00rootroot00000000000000package com.iluwatar.abstractfactory; /** * * OrcArmy * */ public class OrcArmy implements Army { static final String DESCRIPTION = "This is the Orc Army!"; @Override public String getDescription() { return DESCRIPTION; } } OrcCastle.java000066400000000000000000000003741264154357600337400ustar00rootroot00000000000000java-design-patterns-1.9.0/abstract-factory/src/main/java/com/iluwatar/abstractfactorypackage com.iluwatar.abstractfactory; /** * * OrcCastle * */ public class OrcCastle implements Castle { static final String DESCRIPTION = "This is the Orc castle!"; @Override public String getDescription() { return DESCRIPTION; } } java-design-patterns-1.9.0/abstract-factory/src/main/java/com/iluwatar/abstractfactory/OrcKing.java000066400000000000000000000003641264154357600334730ustar00rootroot00000000000000package com.iluwatar.abstractfactory; /** * * OrcKing * */ public class OrcKing implements King { static final String DESCRIPTION = "This is the Orc king!"; @Override public String getDescription() { return DESCRIPTION; } } OrcKingdomFactory.java000066400000000000000000000005251264154357600354430ustar00rootroot00000000000000java-design-patterns-1.9.0/abstract-factory/src/main/java/com/iluwatar/abstractfactorypackage com.iluwatar.abstractfactory; /** * * OrcKingdomFactory concrete factory. * */ public class OrcKingdomFactory implements KingdomFactory { public Castle createCastle() { return new OrcCastle(); } public King createKing() { return new OrcKing(); } public Army createArmy() { return new OrcArmy(); } } java-design-patterns-1.9.0/abstract-factory/src/test/000077500000000000000000000000001264154357600226025ustar00rootroot00000000000000java-design-patterns-1.9.0/abstract-factory/src/test/java/000077500000000000000000000000001264154357600235235ustar00rootroot00000000000000java-design-patterns-1.9.0/abstract-factory/src/test/java/com/000077500000000000000000000000001264154357600243015ustar00rootroot00000000000000java-design-patterns-1.9.0/abstract-factory/src/test/java/com/iluwatar/000077500000000000000000000000001264154357600261315ustar00rootroot00000000000000java-design-patterns-1.9.0/abstract-factory/src/test/java/com/iluwatar/abstractfactory/000077500000000000000000000000001264154357600313245ustar00rootroot00000000000000java-design-patterns-1.9.0/abstract-factory/src/test/java/com/iluwatar/abstractfactory/AppTest.java000066400000000000000000000050031264154357600335450ustar00rootroot00000000000000package com.iluwatar.abstractfactory; import static org.junit.Assert.assertEquals; import static org.junit.Assert.assertTrue; import org.junit.Before; import org.junit.Test; public class AppTest { private App app = new App(); private KingdomFactory elfFactory; private KingdomFactory orcFactory; @Before public void setUp() { elfFactory = app.getElfKingdomFactory(); orcFactory = app.getOrcKingdomFactory(); } @Test public void king() { final King elfKing = app.getKing(elfFactory); assertTrue(elfKing instanceof ElfKing); assertEquals(ElfKing.DESCRIPTION, elfKing.getDescription()); final King orcKing = app.getKing(orcFactory); assertTrue(orcKing instanceof OrcKing); assertEquals(OrcKing.DESCRIPTION, orcKing.getDescription()); } @Test public void castle() { final Castle elfCastle = app.getCastle(elfFactory); assertTrue(elfCastle instanceof ElfCastle); assertEquals(ElfCastle.DESCRIPTION, elfCastle.getDescription()); final Castle orcCastle = app.getCastle(orcFactory); assertTrue(orcCastle instanceof OrcCastle); assertEquals(OrcCastle.DESCRIPTION, orcCastle.getDescription()); } @Test public void army() { final Army elfArmy = app.getArmy(elfFactory); assertTrue(elfArmy instanceof ElfArmy); assertEquals(ElfArmy.DESCRIPTION, elfArmy.getDescription()); final Army orcArmy = app.getArmy(orcFactory); assertTrue(orcArmy instanceof OrcArmy); assertEquals(OrcArmy.DESCRIPTION, orcArmy.getDescription()); } @Test public void createElfKingdom() { app.createKingdom(elfFactory); final King king = app.getKing(); final Castle castle = app.getCastle(); final Army army = app.getArmy(); assertTrue(king instanceof ElfKing); assertEquals(ElfKing.DESCRIPTION, king.getDescription()); assertTrue(castle instanceof ElfCastle); assertEquals(ElfCastle.DESCRIPTION, castle.getDescription()); assertTrue(army instanceof ElfArmy); assertEquals(ElfArmy.DESCRIPTION, army.getDescription()); } @Test public void createOrcKingdom() { app.createKingdom(orcFactory); final King king = app.getKing(); final Castle castle = app.getCastle(); final Army army = app.getArmy(); assertTrue(king instanceof OrcKing); assertEquals(OrcKing.DESCRIPTION, king.getDescription()); assertTrue(castle instanceof OrcCastle); assertEquals(OrcCastle.DESCRIPTION, castle.getDescription()); assertTrue(army instanceof OrcArmy); assertEquals(OrcArmy.DESCRIPTION, army.getDescription()); } } java-design-patterns-1.9.0/adapter/000077500000000000000000000000001264154357600172045ustar00rootroot00000000000000java-design-patterns-1.9.0/adapter/etc/000077500000000000000000000000001264154357600177575ustar00rootroot00000000000000java-design-patterns-1.9.0/adapter/etc/adapter.png000066400000000000000000000274661264154357600221240ustar00rootroot00000000000000PNG  IHDR59]F).IDATxmՙ[ZEBivR.Kh%37 \|00`$Bİi;1 !D1,ܐ8Z<8iXI7 e>=]Nz9OzS]<@'(">50qst;$bV6fYO}2'(8蓡>@A 5 N9iH~d5--mv/OPp ק89ԙmvV'BPL}eC"Ijk;_[ -{Y[PVWgW%} ϴ܏'j[aІn1Q-#f?@e>CQ,o -Ti)OPp OJpnQI,y[ky/Û o4+}@$E'!0U!|E'sJcZ=G̟`XOd]rl>!*߬;:d-{\;sIL(O&@~!#m]"tghJvSfՑpKY>gJ gtM d2RÙp@ 5BFj8Sp6蓡FH g }2Iyd7+r;ͤw  ҁ>jTo&q6HG);K>uϵ7>=ˢ%*2Rq 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֫XDRC4O4)24PzcS)F!ӈ4uc7>htTdI2(OKYiL[QGs,M1 @@ZiZoͶSjVE–XybSzcFވU^P_(B;̩>-e1 ' j!C̚!uѧ4W SyꍡOO1UukT.+i*+j4' j)<Ձquѧ(˾Ҙ!e7>hhTOAe@' j$LiIBhQLi eF^a4𴄎a(5 C%t s]@W2 <-c" DilzI "_E" 5 }"80&0@ E}">@y˟VIENDB`java-design-patterns-1.9.0/adapter/etc/adapter.ucls000066400000000000000000000103131264154357600222650ustar00rootroot00000000000000 java-design-patterns-1.9.0/adapter/index.md000066400000000000000000000022571264154357600206430ustar00rootroot00000000000000--- layout: pattern title: Adapter folder: adapter permalink: /patterns/adapter/ categories: Structural tags: - Java - Gang Of Four - Difficulty-Beginner --- **Also known as:** Wrapper **Intent:** Convert the interface of a class into another interface the clients expect. Adapter lets classes work together that couldn't otherwise because of incompatible interfaces. ![alt text](./etc/adapter.png "Adapter") **Applicability:** Use the Adapter pattern when * you want to use an existing class, and its interface does not match the one you need * you want to create a reusable class that cooperates with unrelated or unforeseen classes, that is, classes that don't necessarily have compatible interfaces * you need to use several existing subclasses, but it's impractical to adapt their interface by subclassing every one. An object adapter can adapt the interface of its parent class. **Real world examples:** * [java.util.Arrays#asList()](http://docs.oracle.com/javase/8/docs/api/java/util/Arrays.html#asList%28T...%29) **Credits** * [Design Patterns: Elements of Reusable Object-Oriented Software](http://www.amazon.com/Design-Patterns-Elements-Reusable-Object-Oriented/dp/0201633612) java-design-patterns-1.9.0/adapter/pom.xml000066400000000000000000000013661264154357600205270ustar00rootroot00000000000000 4.0.0 com.iluwatar java-design-patterns 1.9.0 adapter junit junit test org.mockito mockito-core test java-design-patterns-1.9.0/adapter/src/000077500000000000000000000000001264154357600177735ustar00rootroot00000000000000java-design-patterns-1.9.0/adapter/src/main/000077500000000000000000000000001264154357600207175ustar00rootroot00000000000000java-design-patterns-1.9.0/adapter/src/main/java/000077500000000000000000000000001264154357600216405ustar00rootroot00000000000000java-design-patterns-1.9.0/adapter/src/main/java/com/000077500000000000000000000000001264154357600224165ustar00rootroot00000000000000java-design-patterns-1.9.0/adapter/src/main/java/com/iluwatar/000077500000000000000000000000001264154357600242465ustar00rootroot00000000000000java-design-patterns-1.9.0/adapter/src/main/java/com/iluwatar/adapter/000077500000000000000000000000001264154357600256665ustar00rootroot00000000000000java-design-patterns-1.9.0/adapter/src/main/java/com/iluwatar/adapter/App.java000066400000000000000000000027621264154357600272600ustar00rootroot00000000000000package com.iluwatar.adapter; /** * An adapter helps two incompatible interfaces to work together. This is the real world definition * for an adapter. Interfaces may be incompatible but the inner functionality should suit the need. * The Adapter design pattern allows otherwise incompatible classes to work together by converting * the interface of one class into an interface expected by the clients. * *

* There are two variations of the Adapter pattern: The class adapter implements the adaptee's * interface whereas the object adapter uses composition to contain the adaptee in the adapter * object. This example uses the object adapter approach. * *

* The Adapter ({@link BattleFishingBoat}) converts the interface of the adaptee class ( * {@link FishingBoat}) into a suitable one expected by the client ( {@link BattleShip} ). * *

* The story of this implementation is this.
* Pirates are coming! we need a {@link BattleShip} to fight! We have a {@link FishingBoat} and our * captain. We have no time to make up a new ship! we need to reuse this {@link FishingBoat}. The * captain needs a battleship which can fire and move. The spec is in {@link BattleShip}. We will * use the Adapter pattern to reuse {@link FishingBoat}. * */ public class App { /** * Program entry point. * * @param args command line args */ public static void main(String[] args) { Captain captain = new Captain(new BattleFishingBoat()); captain.move(); captain.fire(); } } java-design-patterns-1.9.0/adapter/src/main/java/com/iluwatar/adapter/BattleFishingBoat.java000066400000000000000000000013241264154357600320620ustar00rootroot00000000000000package com.iluwatar.adapter; /** * * Adapter class. Adapts the interface of the device ({@link FishingBoat}) into {@link BattleShip} * interface expected by the client ({@link Captain}).
* In this case we added a new function fire to suit the interface. We are reusing the * {@link FishingBoat} without changing itself. The Adapter class can just map the functions of the * Adaptee or add, delete features of the Adaptee. * */ public class BattleFishingBoat implements BattleShip { private FishingBoat boat; public BattleFishingBoat() { boat = new FishingBoat(); } @Override public void fire() { System.out.println("fire!"); } @Override public void move() { boat.sail(); } } java-design-patterns-1.9.0/adapter/src/main/java/com/iluwatar/adapter/BattleShip.java000066400000000000000000000002731264154357600305720ustar00rootroot00000000000000package com.iluwatar.adapter; /** * The interface expected by the client.
* A Battleship can fire and move. * */ public interface BattleShip { void fire(); void move(); } java-design-patterns-1.9.0/adapter/src/main/java/com/iluwatar/adapter/Captain.java000066400000000000000000000010331264154357600301050ustar00rootroot00000000000000package com.iluwatar.adapter; /** * The Captain uses {@link BattleShip} to fight.
* This is the client in the pattern. */ public class Captain implements BattleShip { private BattleShip battleship; public Captain() { } public Captain(BattleShip battleship) { this.battleship = battleship; } public void setBattleship(BattleShip battleship) { this.battleship = battleship; } @Override public void fire() { battleship.fire(); } @Override public void move() { battleship.move(); } } java-design-patterns-1.9.0/adapter/src/main/java/com/iluwatar/adapter/FishingBoat.java000066400000000000000000000004541264154357600307310ustar00rootroot00000000000000package com.iluwatar.adapter; /** * * Device class (adaptee in the pattern). We want to reuse this class * */ public class FishingBoat { public void sail() { System.out.println("The Boat is moving to that place"); } public void fish() { System.out.println("fishing ..."); } } java-design-patterns-1.9.0/adapter/src/test/000077500000000000000000000000001264154357600207525ustar00rootroot00000000000000java-design-patterns-1.9.0/adapter/src/test/java/000077500000000000000000000000001264154357600216735ustar00rootroot00000000000000java-design-patterns-1.9.0/adapter/src/test/java/com/000077500000000000000000000000001264154357600224515ustar00rootroot00000000000000java-design-patterns-1.9.0/adapter/src/test/java/com/iluwatar/000077500000000000000000000000001264154357600243015ustar00rootroot00000000000000java-design-patterns-1.9.0/adapter/src/test/java/com/iluwatar/adapter/000077500000000000000000000000001264154357600257215ustar00rootroot00000000000000java-design-patterns-1.9.0/adapter/src/test/java/com/iluwatar/adapter/AdapterPatternTest.java000066400000000000000000000031351264154357600323440ustar00rootroot00000000000000package com.iluwatar.adapter; import org.junit.Before; import org.junit.Test; import java.util.HashMap; import java.util.Map; import static org.mockito.Mockito.spy; import static org.mockito.Mockito.verify; /** * Test class * */ public class AdapterPatternTest { private Map beans; private static final String BATTLESHIP_BEAN = "engineer"; private static final String CAPTAIN_BEAN = "captain"; /** * This method runs before the test execution and sets the bean objects in the beans Map. */ @Before public void setup() { beans = new HashMap<>(); BattleFishingBoat battleFishingBoat = spy(new BattleFishingBoat()); beans.put(BATTLESHIP_BEAN, battleFishingBoat); Captain captain = new Captain(); captain.setBattleship((BattleFishingBoat) beans.get(BATTLESHIP_BEAN)); beans.put(CAPTAIN_BEAN, captain); } /** * This test asserts that when we use the move() method on a captain bean(client), it is * internally calling move method on the battleship object. The Adapter ({@link BattleFishingBoat} * ) converts the interface of the target class ( {@link FishingBoat}) into a suitable one * expected by the client ({@link Captain} ). */ @Test public void testAdapter() { BattleShip captain = (BattleShip) beans.get(CAPTAIN_BEAN); // when captain moves captain.move(); // the captain internally calls the battleship object to move BattleShip battleship = (BattleShip) beans.get(BATTLESHIP_BEAN); verify(battleship).move(); // same with above with firing captain.fire(); verify(battleship).fire(); } } java-design-patterns-1.9.0/async-method-invocation/000077500000000000000000000000001264154357600223265ustar00rootroot00000000000000java-design-patterns-1.9.0/async-method-invocation/etc/000077500000000000000000000000001264154357600231015ustar00rootroot00000000000000java-design-patterns-1.9.0/async-method-invocation/etc/async-method-invocation.png000066400000000000000000001100731264154357600303530ustar00rootroot00000000000000PNG  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The pattern provides parallel processing of multiple independent tasks and retrieving the results via callbacks or waiting until everything is done. ![alt text](./etc/async-method-invocation.png "Async Method Invocation") **Applicability:** Use async method invocation pattern when * you have multiple independent tasks that can run in parallel * you need to improve the performance of a group of sequential tasks * you have limited amount of processing capacity or long running tasks and the caller should not wait the tasks to be ready **Real world examples:** * [FutureTask](http://docs.oracle.com/javase/8/docs/api/java/util/concurrent/FutureTask.html), [CompletableFuture](https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/CompletableFuture.html) and [ExecutorService](http://docs.oracle.com/javase/8/docs/api/java/util/concurrent/ExecutorService.html) (Java) * [Task-based Asynchronous Pattern](https://msdn.microsoft.com/en-us/library/hh873175.aspx) (.NET) java-design-patterns-1.9.0/async-method-invocation/pom.xml000066400000000000000000000014131264154357600236420ustar00rootroot00000000000000 4.0.0 com.iluwatar java-design-patterns 1.9.0 async-method-invocation junit junit test org.mockito mockito-core test java-design-patterns-1.9.0/async-method-invocation/src/000077500000000000000000000000001264154357600231155ustar00rootroot00000000000000java-design-patterns-1.9.0/async-method-invocation/src/main/000077500000000000000000000000001264154357600240415ustar00rootroot00000000000000java-design-patterns-1.9.0/async-method-invocation/src/main/java/000077500000000000000000000000001264154357600247625ustar00rootroot00000000000000java-design-patterns-1.9.0/async-method-invocation/src/main/java/com/000077500000000000000000000000001264154357600255405ustar00rootroot00000000000000java-design-patterns-1.9.0/async-method-invocation/src/main/java/com/iluwatar/000077500000000000000000000000001264154357600273705ustar00rootroot00000000000000java-design-patterns-1.9.0/async-method-invocation/src/main/java/com/iluwatar/async/000077500000000000000000000000001264154357600305055ustar00rootroot00000000000000java-design-patterns-1.9.0/async-method-invocation/src/main/java/com/iluwatar/async/method/000077500000000000000000000000001264154357600317655ustar00rootroot00000000000000invocation/000077500000000000000000000000001264154357600340575ustar00rootroot00000000000000java-design-patterns-1.9.0/async-method-invocation/src/main/java/com/iluwatar/async/methodApp.java000066400000000000000000000101411264154357600354370ustar00rootroot00000000000000java-design-patterns-1.9.0/async-method-invocation/src/main/java/com/iluwatar/async/method/invocationpackage com.iluwatar.async.method.invocation; import java.util.concurrent.Callable; /** * This application demonstrates the async method invocation pattern. Key parts of the pattern are * AsyncResult which is an intermediate container for an asynchronously evaluated value, * AsyncCallback which can be provided to be executed on task completion and AsyncExecutor * that manages the execution of the async tasks. *

* The main method shows example flow of async invocations. The main thread starts multiple tasks with variable * durations and then continues its own work. When the main thread has done it's job it collects the results of the * async tasks. Two of the tasks are handled with callbacks, meaning the callbacks are executed immediately when the * tasks complete. *

* Noteworthy difference of thread usage between the async results and callbacks is that the async results are collected * in the main thread but the callbacks are executed within the worker threads. This should be noted when working with * thread pools. *

* Java provides its own implementations of async method invocation pattern. FutureTask, CompletableFuture and * ExecutorService are the real world implementations of this pattern. But due to the nature of parallel programming, * the implementations are not trivial. This example does not take all possible scenarios into account but rather * provides a simple version that helps to understand the pattern. * * @see AsyncResult * @see AsyncCallback * @see AsyncExecutor * * @see java.util.concurrent.FutureTask * @see java.util.concurrent.CompletableFuture * @see java.util.concurrent.ExecutorService */ public class App { /** * Program entry point */ public static void main(String[] args) throws Exception { // construct a new executor that will run async tasks AsyncExecutor executor = new ThreadAsyncExecutor(); // start few async tasks with varying processing times, two last with callback handlers AsyncResult asyncResult1 = executor.startProcess(lazyval(10, 500)); AsyncResult asyncResult2 = executor.startProcess(lazyval("test", 300)); AsyncResult asyncResult3 = executor.startProcess(lazyval(50L, 700)); AsyncResult asyncResult4 = executor.startProcess(lazyval(20, 400), callback("Callback result 4")); AsyncResult asyncResult5 = executor.startProcess(lazyval("callback", 600), callback("Callback result 5")); // emulate processing in the current thread while async tasks are running in their own threads Thread.sleep(350); // Oh boy I'm working hard here log("Some hard work done"); // wait for completion of the tasks Integer result1 = executor.endProcess(asyncResult1); String result2 = executor.endProcess(asyncResult2); Long result3 = executor.endProcess(asyncResult3); asyncResult4.await(); asyncResult5.await(); // log the results of the tasks, callbacks log immediately when complete log("Result 1: " + result1); log("Result 2: " + result2); log("Result 3: " + result3); } /** * Creates a callable that lazily evaluates to given value with artificial delay. * * @param value * value to evaluate * @param delayMillis * artificial delay in milliseconds * @return new callable for lazy evaluation */ private static Callable lazyval(T value, long delayMillis) { return () -> { Thread.sleep(delayMillis); log("Task completed with: " + value); return value; }; } /** * Creates a simple callback that logs the complete status of the async result. * * @param name * callback name * @return new async callback */ private static AsyncCallback callback(String name) { return (value, ex) -> { if (ex.isPresent()) { log(name + " failed: " + ex.map(Exception::getMessage).orElse("")); } else { log(name + ": " + value); } }; } private static void log(String msg) { System.out.println(String.format("[%1$-10s] - %2$s", Thread.currentThread().getName(), msg)); } } AsyncCallback.java000066400000000000000000000007671264154357600374260ustar00rootroot00000000000000java-design-patterns-1.9.0/async-method-invocation/src/main/java/com/iluwatar/async/method/invocationpackage com.iluwatar.async.method.invocation; import java.util.Optional; /** * * AsyncCallback interface * * @param * */ public interface AsyncCallback { /** * Complete handler which is executed when async task is completed or fails execution. * * @param value the evaluated value from async task, undefined when execution fails * @param ex empty value if execution succeeds, some exception if executions fails */ void onComplete(T value, Optional ex); } AsyncExecutor.java000066400000000000000000000024701264154357600375210ustar00rootroot00000000000000java-design-patterns-1.9.0/async-method-invocation/src/main/java/com/iluwatar/async/method/invocationpackage com.iluwatar.async.method.invocation; import java.util.concurrent.Callable; import java.util.concurrent.ExecutionException; /** * * AsyncExecutor interface * */ public interface AsyncExecutor { /** * Starts processing of an async task. Returns immediately with async result. * * @param task task to be executed asynchronously * @return async result for the task */ AsyncResult startProcess(Callable task); /** * Starts processing of an async task. Returns immediately with async result. Executes callback * when the task is completed. * * @param task task to be executed asynchronously * @param callback callback to be executed on task completion * @return async result for the task */ AsyncResult startProcess(Callable task, AsyncCallback callback); /** * Ends processing of an async task. Blocks the current thread if necessary and returns the * evaluated value of the completed task. * * @param asyncResult async result of a task * @return evaluated value of the completed task * @throws ExecutionException if execution has failed, containing the root cause * @throws InterruptedException if the execution is interrupted */ T endProcess(AsyncResult asyncResult) throws ExecutionException, InterruptedException; } AsyncResult.java000066400000000000000000000015211264154357600371750ustar00rootroot00000000000000java-design-patterns-1.9.0/async-method-invocation/src/main/java/com/iluwatar/async/method/invocationpackage com.iluwatar.async.method.invocation; import java.util.concurrent.ExecutionException; /** * * AsyncResult interface */ public interface AsyncResult { /** * Status of the async task execution. * * @return true if execution is completed or failed */ boolean isCompleted(); /** * Gets the value of completed async task. * * @return evaluated value or throws ExecutionException if execution has failed * @throws ExecutionException if execution has failed, containing the root cause * @throws IllegalStateException if execution is not completed */ T getValue() throws ExecutionException; /** * Blocks the current thread until the async task is completed. * * @throws InterruptedException if the execution is interrupted */ void await() throws InterruptedException; } ThreadAsyncExecutor.java000066400000000000000000000067501264154357600406560ustar00rootroot00000000000000java-design-patterns-1.9.0/async-method-invocation/src/main/java/com/iluwatar/async/method/invocationpackage com.iluwatar.async.method.invocation; import java.util.Optional; import java.util.concurrent.Callable; import java.util.concurrent.ExecutionException; import java.util.concurrent.atomic.AtomicInteger; /** * * Implementation of async executor that creates a new thread for every task. * */ public class ThreadAsyncExecutor implements AsyncExecutor { /** Index for thread naming */ private final AtomicInteger idx = new AtomicInteger(0); @Override public AsyncResult startProcess(Callable task) { return startProcess(task, null); } @Override public AsyncResult startProcess(Callable task, AsyncCallback callback) { CompletableResult result = new CompletableResult<>(callback); new Thread(() -> { try { result.setValue(task.call()); } catch (Exception ex) { result.setException(ex); } } , "executor-" + idx.incrementAndGet()).start(); return result; } @Override public T endProcess(AsyncResult asyncResult) throws ExecutionException, InterruptedException { if (asyncResult.isCompleted()) { return asyncResult.getValue(); } else { asyncResult.await(); return asyncResult.getValue(); } } /** * Simple implementation of async result that allows completing it successfully with a value or exceptionally with an * exception. A really simplified version from its real life cousins FutureTask and CompletableFuture. * * @see java.util.concurrent.FutureTask * @see java.util.concurrent.CompletableFuture */ private static class CompletableResult implements AsyncResult { static final int RUNNING = 1; static final int FAILED = 2; static final int COMPLETED = 3; final Object lock; final Optional> callback; volatile int state = RUNNING; T value; Exception exception; CompletableResult(AsyncCallback callback) { this.lock = new Object(); this.callback = Optional.ofNullable(callback); } /** * Sets the value from successful execution and executes callback if available. Notifies any thread waiting for * completion. * * @param value * value of the evaluated task */ void setValue(T value) { this.value = value; this.state = COMPLETED; this.callback.ifPresent(ac -> ac.onComplete(value, Optional.empty())); synchronized (lock) { lock.notifyAll(); } } /** * Sets the exception from failed execution and executes callback if available. Notifies any thread waiting for * completion. * * @param exception * exception of the failed task */ void setException(Exception exception) { this.exception = exception; this.state = FAILED; this.callback.ifPresent(ac -> ac.onComplete(null, Optional.of(exception))); synchronized (lock) { lock.notifyAll(); } } @Override public boolean isCompleted() { return state > RUNNING; } @Override public T getValue() throws ExecutionException { if (state == COMPLETED) { return value; } else if (state == FAILED) { throw new ExecutionException(exception); } else { throw new IllegalStateException("Execution not completed yet"); } } @Override public void await() throws InterruptedException { synchronized (lock) { if (!isCompleted()) { lock.wait(); } } } } } java-design-patterns-1.9.0/async-method-invocation/src/test/000077500000000000000000000000001264154357600240745ustar00rootroot00000000000000java-design-patterns-1.9.0/async-method-invocation/src/test/java/000077500000000000000000000000001264154357600250155ustar00rootroot00000000000000java-design-patterns-1.9.0/async-method-invocation/src/test/java/com/000077500000000000000000000000001264154357600255735ustar00rootroot00000000000000java-design-patterns-1.9.0/async-method-invocation/src/test/java/com/iluwatar/000077500000000000000000000000001264154357600274235ustar00rootroot00000000000000java-design-patterns-1.9.0/async-method-invocation/src/test/java/com/iluwatar/async/000077500000000000000000000000001264154357600305405ustar00rootroot00000000000000java-design-patterns-1.9.0/async-method-invocation/src/test/java/com/iluwatar/async/method/000077500000000000000000000000001264154357600320205ustar00rootroot00000000000000invocation/000077500000000000000000000000001264154357600341125ustar00rootroot00000000000000java-design-patterns-1.9.0/async-method-invocation/src/test/java/com/iluwatar/async/methodAppTest.java000066400000000000000000000003441264154357600363360ustar00rootroot00000000000000java-design-patterns-1.9.0/async-method-invocation/src/test/java/com/iluwatar/async/method/invocationpackage com.iluwatar.async.method.invocation; import org.junit.Test; /** * * Application test * */ public class AppTest { @Test public void test() throws Exception { String[] args = {}; App.main(args); } } ThreadAsyncExecutorTest.java000066400000000000000000000254531264154357600415520ustar00rootroot00000000000000java-design-patterns-1.9.0/async-method-invocation/src/test/java/com/iluwatar/async/method/invocationpackage com.iluwatar.async.method.invocation; import org.junit.Test; import org.mockito.ArgumentCaptor; import org.mockito.Matchers; import java.util.Optional; import java.util.concurrent.Callable; import java.util.concurrent.ExecutionException; import static org.junit.Assert.*; import static org.mockito.Matchers.eq; import static org.mockito.Mockito.*; import static org.mockito.internal.verification.VerificationModeFactory.times; /** * Date: 12/6/15 - 10:49 AM * * @author Jeroen Meulemeester */ public class ThreadAsyncExecutorTest { /** * Test used to verify the happy path of {@link ThreadAsyncExecutor#startProcess(Callable)} */ @Test(timeout = 3000) public void testSuccessfulTaskWithoutCallback() throws Exception { // Instantiate a new executor and start a new 'null' task ... final ThreadAsyncExecutor executor = new ThreadAsyncExecutor(); final Object result = new Object(); final Callable task = mock(Callable.class); when(task.call()).thenReturn(result); final AsyncResult asyncResult = executor.startProcess(task); assertNotNull(asyncResult); asyncResult.await(); // Prevent timing issues, and wait until the result is available assertTrue(asyncResult.isCompleted()); // Our task should only execute once ... verify(task, times(1)).call(); // ... and the result should be exactly the same object assertSame(result, asyncResult.getValue()); } /** * Test used to verify the happy path of {@link ThreadAsyncExecutor#startProcess(Callable, AsyncCallback)} */ @Test(timeout = 3000) public void testSuccessfulTaskWithCallback() throws Exception { // Instantiate a new executor and start a new 'null' task ... final ThreadAsyncExecutor executor = new ThreadAsyncExecutor(); final Object result = new Object(); final Callable task = mock(Callable.class); when(task.call()).thenReturn(result); final AsyncCallback callback = mock(AsyncCallback.class); final AsyncResult asyncResult = executor.startProcess(task, callback); assertNotNull(asyncResult); asyncResult.await(); // Prevent timing issues, and wait until the result is available assertTrue(asyncResult.isCompleted()); // Our task should only execute once ... verify(task, times(1)).call(); // ... same for the callback, we expect our object final ArgumentCaptor> optionalCaptor = ArgumentCaptor.forClass((Class) Optional.class); verify(callback, times(1)).onComplete(eq(result), optionalCaptor.capture()); final Optional optionalException = optionalCaptor.getValue(); assertNotNull(optionalException); assertFalse(optionalException.isPresent()); // ... and the result should be exactly the same object assertSame(result, asyncResult.getValue()); } /** * Test used to verify the happy path of {@link ThreadAsyncExecutor#startProcess(Callable)} when a task takes a while * to execute */ @Test(timeout = 5000) public void testLongRunningTaskWithoutCallback() throws Exception { // Instantiate a new executor and start a new 'null' task ... final ThreadAsyncExecutor executor = new ThreadAsyncExecutor(); final Object result = new Object(); final Callable task = mock(Callable.class); when(task.call()).thenAnswer(i -> { Thread.sleep(1500); return result; }); final AsyncResult asyncResult = executor.startProcess(task); assertNotNull(asyncResult); assertFalse(asyncResult.isCompleted()); try { asyncResult.getValue(); fail("Expected IllegalStateException when calling AsyncResult#getValue on a non-completed task"); } catch (IllegalStateException e) { assertNotNull(e.getMessage()); } // Our task should only execute once, but it can take a while ... verify(task, timeout(3000).times(1)).call(); // Prevent timing issues, and wait until the result is available asyncResult.await(); assertTrue(asyncResult.isCompleted()); verifyNoMoreInteractions(task); // ... and the result should be exactly the same object assertSame(result, asyncResult.getValue()); } /** * Test used to verify the happy path of {@link ThreadAsyncExecutor#startProcess(Callable, AsyncCallback)} when a task * takes a while to execute */ @Test(timeout = 5000) public void testLongRunningTaskWithCallback() throws Exception { // Instantiate a new executor and start a new 'null' task ... final ThreadAsyncExecutor executor = new ThreadAsyncExecutor(); final Object result = new Object(); final Callable task = mock(Callable.class); when(task.call()).thenAnswer(i -> { Thread.sleep(1500); return result; }); final AsyncCallback callback = mock(AsyncCallback.class); final AsyncResult asyncResult = executor.startProcess(task, callback); assertNotNull(asyncResult); assertFalse(asyncResult.isCompleted()); verifyZeroInteractions(callback); try { asyncResult.getValue(); fail("Expected IllegalStateException when calling AsyncResult#getValue on a non-completed task"); } catch (IllegalStateException e) { assertNotNull(e.getMessage()); } // Our task should only execute once, but it can take a while ... verify(task, timeout(3000).times(1)).call(); final ArgumentCaptor> optionalCaptor = ArgumentCaptor.forClass((Class) Optional.class); verify(callback, timeout(3000).times(1)).onComplete(eq(result), optionalCaptor.capture()); final Optional optionalException = optionalCaptor.getValue(); assertNotNull(optionalException); assertFalse(optionalException.isPresent()); // Prevent timing issues, and wait until the result is available asyncResult.await(); assertTrue(asyncResult.isCompleted()); verifyNoMoreInteractions(task, callback); // ... and the result should be exactly the same object assertSame(result, asyncResult.getValue()); } /** * Test used to verify the happy path of {@link ThreadAsyncExecutor#startProcess(Callable)} when a task takes a while * to execute, while waiting on the result using {@link ThreadAsyncExecutor#endProcess(AsyncResult)} */ @Test(timeout = 5000) public void testEndProcess() throws Exception { // Instantiate a new executor and start a new 'null' task ... final ThreadAsyncExecutor executor = new ThreadAsyncExecutor(); final Object result = new Object(); final Callable task = mock(Callable.class); when(task.call()).thenAnswer(i -> { Thread.sleep(1500); return result; }); final AsyncResult asyncResult = executor.startProcess(task); assertNotNull(asyncResult); assertFalse(asyncResult.isCompleted()); try { asyncResult.getValue(); fail("Expected IllegalStateException when calling AsyncResult#getValue on a non-completed task"); } catch (IllegalStateException e) { assertNotNull(e.getMessage()); } assertSame(result, executor.endProcess(asyncResult)); verify(task, times(1)).call(); assertTrue(asyncResult.isCompleted()); // Calling end process a second time while already finished should give the same result assertSame(result, executor.endProcess(asyncResult)); verifyNoMoreInteractions(task); } /** * Test used to verify the behaviour of {@link ThreadAsyncExecutor#startProcess(Callable)} when the callable is 'null' */ @Test(timeout = 3000) public void testNullTask() throws Exception { // Instantiate a new executor and start a new 'null' task ... final ThreadAsyncExecutor executor = new ThreadAsyncExecutor(); final AsyncResult asyncResult = executor.startProcess(null); assertNotNull("The AsyncResult should not be 'null', even though the task was 'null'.", asyncResult); asyncResult.await(); // Prevent timing issues, and wait until the result is available assertTrue(asyncResult.isCompleted()); try { asyncResult.getValue(); fail("Expected ExecutionException with NPE as cause"); } catch (final ExecutionException e) { assertNotNull(e.getMessage()); assertNotNull(e.getCause()); assertEquals(NullPointerException.class, e.getCause().getClass()); } } /** * Test used to verify the behaviour of {@link ThreadAsyncExecutor#startProcess(Callable, AsyncCallback)} when the * callable is 'null', but the asynchronous callback is provided */ @Test(timeout = 3000) public void testNullTaskWithCallback() throws Exception { // Instantiate a new executor and start a new 'null' task ... final ThreadAsyncExecutor executor = new ThreadAsyncExecutor(); final AsyncCallback callback = mock(AsyncCallback.class); final AsyncResult asyncResult = executor.startProcess(null, callback); assertNotNull("The AsyncResult should not be 'null', even though the task was 'null'.", asyncResult); asyncResult.await(); // Prevent timing issues, and wait until the result is available assertTrue(asyncResult.isCompleted()); final ArgumentCaptor> optionalCaptor = ArgumentCaptor.forClass((Class) Optional.class); verify(callback, times(1)).onComplete(Matchers.isNull(), optionalCaptor.capture()); final Optional optionalException = optionalCaptor.getValue(); assertNotNull(optionalException); assertTrue(optionalException.isPresent()); final Exception exception = optionalException.get(); assertNotNull(exception); assertEquals(NullPointerException.class, exception.getClass()); try { asyncResult.getValue(); fail("Expected ExecutionException with NPE as cause"); } catch (final ExecutionException e) { assertNotNull(e.getMessage()); assertNotNull(e.getCause()); assertEquals(NullPointerException.class, e.getCause().getClass()); } } /** * Test used to verify the behaviour of {@link ThreadAsyncExecutor#startProcess(Callable, AsyncCallback)} when both * the callable and the asynchronous callback are 'null' */ @Test(timeout = 3000) public void testNullTaskWithNullCallback() throws Exception { // Instantiate a new executor and start a new 'null' task ... final ThreadAsyncExecutor executor = new ThreadAsyncExecutor(); final AsyncResult asyncResult = executor.startProcess(null, null); assertNotNull("The AsyncResult should not be 'null', even though the task and callback were 'null'.", asyncResult); asyncResult.await(); // Prevent timing issues, and wait until the result is available assertTrue(asyncResult.isCompleted()); try { asyncResult.getValue(); fail("Expected ExecutionException with NPE as cause"); } catch (final ExecutionException e) { assertNotNull(e.getMessage()); assertNotNull(e.getCause()); assertEquals(NullPointerException.class, e.getCause().getClass()); } } }java-design-patterns-1.9.0/bridge/000077500000000000000000000000001264154357600170205ustar00rootroot00000000000000java-design-patterns-1.9.0/bridge/etc/000077500000000000000000000000001264154357600175735ustar00rootroot00000000000000java-design-patterns-1.9.0/bridge/etc/bridge.png000066400000000000000000001503571264154357600215500ustar00rootroot00000000000000PNG  IHDRDFMжIDATx]y?hˠHP؛:ۦnQ;00RE6QZu2͋ɮU]d%ǓM qb)HԒj[UP]CΐÇ/$.Crfv}91@}ӀF\P_𫇙`Bsu z5~@*@e 4/031HDjTF& @$ B]f B f. 3D 3Em{0خBTaf␈ af=hpg fF03qHDͮ(03-"Knz/ ʻ2KQn eI #]4af NP|v֝~{JBiQ>f/!B(&Bu+ͮ| NĐSy]ڛQ1PZsV{j+qaf/*H`P@$ѩ1+*sy1Oj'Q#Q:n=1be&zQxOӷN7Q_4YAt:Zi^EmԾ=W7_Fۏտ/\}W03΢|o{Z=̡0l rI`P펁36j?ӥ A-ԲƛWUǯW{yCA$}_8,irgk]՞>afB$0]ٛW?Ƃ -]Բx/_~KW{.?7cf e0v <\7}00̌>>יcK-=NM9{iFU7\2 ~6K=lzP L1pU/w4Z wFQn3--Բr}nQk O)}1vG_yKm'ơu#bׇhQӭ%-S1%zG:/{^6|eZHݰ|jzP 8U$Sz3ٺ"I`tjY y{x'to?x]8y?23cZ_8Wa5؉EWHiԈxv͛ĽбD5`k>gf=Fc`F"H= B( XB0ۊLnOE)Փz!*,ѩ<~ziq??uVŗv_94mJsfLah*i =:bf{3ǻGe-RPޑDonHX]TusH= B( XBO03SfBZdSnIZC>8r_?~DOw{ [ i1z[{D 4d7jlf`514_čdf-PQ3rI`PmS5c9mOE6h$ѩe1DB=g/n?_?zztjfs)s\,X36ja}_J|zv[zc5ѣq \/siW"Ȑt:j^M#CTYSiEvJ N!9s+[{>O^~F?GԣLiLzep%D U|>,{Jƙ2xRS1-6pc 7myaf<)W(u*̨mL'"C=yBu5Nռ:uLTZdiRS+cr,n?xk>wX\+bfo2wX R5lM& fi2ΜqҸhʞq,r >]!M̌ +*NoKNͥ"Ȑt:Z7Y8OZslgE-zS1DB=Ё}BÙG㻩fUug.6gT33.\Z, NHS9-t: 6&܆F)l?-CӴ1%ר̳_̌ +u)} j'1Ll:efL(rjy7(rt:zm7%Zd2B>eLlY;L".W)[,[ eff bR"H`P]M-(!щ̌ +dsLY[439L.TGb`D,2%0:Czqr -UIúUj)ENsK`P]5Z1 3` n 4Jr53;'Nfֹ"i.TGb BD Ahn*Rڴ $ڝ,)rJӒՓ.TG{1J`t" 4703r+, =R(4&%Q"9-Y=yBu:jF'bBsS3=JENQ P%0:C!'gF̥r'tZr[t[9E%0]b B D 03 3yQt:"D+'щD!ؤ\G껳4FGڶ~dпMtULeu3uW^lWj~">xg]P. 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This might be the case, for example, when the implementation must be selected or switched at run-time. * both the abstractions and their implementations should be extensible by subclassing. In this case, the Bridge pattern lets you combine the different abstractions and implementations and extend them independently * changes in the implementation of an abstraction should have no impact on clients; that is, their code should not have to be recompiled. * you have a proliferation of classes. Such a class hierarchy indicates the need for splitting an object into two parts. Rumbaugh uses the term "nested generalizations" to refer to such class hierarchies * you want to share an implementation among multiple objects (perhaps using reference counting), and this fact should be hidden from the client. A simple example is Coplien's String class, in which multiple objects can share the same string representation. **Credits** * [Design Patterns: Elements of Reusable Object-Oriented Software](http://www.amazon.com/Design-Patterns-Elements-Reusable-Object-Oriented/dp/0201633612) java-design-patterns-1.9.0/bridge/pom.xml000066400000000000000000000013651264154357600203420ustar00rootroot00000000000000 4.0.0 com.iluwatar java-design-patterns 1.9.0 bridge junit junit test org.mockito mockito-core test java-design-patterns-1.9.0/bridge/src/000077500000000000000000000000001264154357600176075ustar00rootroot00000000000000java-design-patterns-1.9.0/bridge/src/main/000077500000000000000000000000001264154357600205335ustar00rootroot00000000000000java-design-patterns-1.9.0/bridge/src/main/java/000077500000000000000000000000001264154357600214545ustar00rootroot00000000000000java-design-patterns-1.9.0/bridge/src/main/java/com/000077500000000000000000000000001264154357600222325ustar00rootroot00000000000000java-design-patterns-1.9.0/bridge/src/main/java/com/iluwatar/000077500000000000000000000000001264154357600240625ustar00rootroot00000000000000java-design-patterns-1.9.0/bridge/src/main/java/com/iluwatar/bridge/000077500000000000000000000000001264154357600253165ustar00rootroot00000000000000java-design-patterns-1.9.0/bridge/src/main/java/com/iluwatar/bridge/App.java000066400000000000000000000024061264154357600267030ustar00rootroot00000000000000package com.iluwatar.bridge; /** * * The Bridge pattern can also be thought of as two layers of abstraction. With Bridge, you can * decouple an abstraction from its implementation so that the two can vary independently. *

* In Bridge pattern both abstraction ({@link MagicWeapon}) and implementation ( * {@link MagicWeaponImpl}) have their own class hierarchies. The interface of the implementations * can be changed without affecting the clients. * */ public class App { /** * Program entry point * * @param args command line args */ public static void main(String[] args) { BlindingMagicWeapon blindingMagicWeapon = new BlindingMagicWeapon(new Excalibur()); blindingMagicWeapon.wield(); blindingMagicWeapon.blind(); blindingMagicWeapon.swing(); blindingMagicWeapon.unwield(); FlyingMagicWeapon flyingMagicWeapon = new FlyingMagicWeapon(new Mjollnir()); flyingMagicWeapon.wield(); flyingMagicWeapon.fly(); flyingMagicWeapon.swing(); flyingMagicWeapon.unwield(); SoulEatingMagicWeapon soulEatingMagicWeapon = new SoulEatingMagicWeapon(new Stormbringer()); soulEatingMagicWeapon.wield(); soulEatingMagicWeapon.swing(); soulEatingMagicWeapon.eatSoul(); soulEatingMagicWeapon.unwield(); } } java-design-patterns-1.9.0/bridge/src/main/java/com/iluwatar/bridge/BlindingMagicWeapon.java000066400000000000000000000010651264154357600320240ustar00rootroot00000000000000package com.iluwatar.bridge; /** * * BlindingMagicWeapon * */ public class BlindingMagicWeapon extends MagicWeapon { public BlindingMagicWeapon(BlindingMagicWeaponImpl imp) { super(imp); } @Override public BlindingMagicWeaponImpl getImp() { return (BlindingMagicWeaponImpl) imp; } @Override public void wield() { getImp().wieldImp(); } @Override public void swing() { getImp().swingImp(); } @Override public void unwield() { getImp().unwieldImp(); } public void blind() { getImp().blindImp(); } } java-design-patterns-1.9.0/bridge/src/main/java/com/iluwatar/bridge/BlindingMagicWeaponImpl.java000066400000000000000000000002671264154357600326510ustar00rootroot00000000000000package com.iluwatar.bridge; /** * * BlindingMagicWeaponImpl * */ public abstract class BlindingMagicWeaponImpl extends MagicWeaponImpl { public abstract void blindImp(); } java-design-patterns-1.9.0/bridge/src/main/java/com/iluwatar/bridge/Excalibur.java000066400000000000000000000010051264154357600300730ustar00rootroot00000000000000package com.iluwatar.bridge; /** * * Excalibur * */ public class Excalibur extends BlindingMagicWeaponImpl { @Override public void wieldImp() { System.out.println("wielding Excalibur"); } @Override public void swingImp() { System.out.println("swinging Excalibur"); } @Override public void unwieldImp() { System.out.println("unwielding Excalibur"); } @Override public void blindImp() { System.out.println("bright light streams from Excalibur blinding the enemy"); } } java-design-patterns-1.9.0/bridge/src/main/java/com/iluwatar/bridge/FlyingMagicWeapon.java000066400000000000000000000010321264154357600315200ustar00rootroot00000000000000package com.iluwatar.bridge; /** * * FlyingMagicWeapon * */ public class FlyingMagicWeapon extends MagicWeapon { public FlyingMagicWeapon(FlyingMagicWeaponImpl imp) { super(imp); } public FlyingMagicWeaponImpl getImp() { return (FlyingMagicWeaponImpl) imp; } @Override public void wield() { getImp().wieldImp(); } @Override public void swing() { getImp().swingImp(); } @Override public void unwield() { getImp().unwieldImp(); } public void fly() { getImp().flyImp(); } } java-design-patterns-1.9.0/bridge/src/main/java/com/iluwatar/bridge/FlyingMagicWeaponImpl.java000066400000000000000000000002611264154357600323450ustar00rootroot00000000000000package com.iluwatar.bridge; /** * * FlyingMagicWeaponImpl * */ public abstract class FlyingMagicWeaponImpl extends MagicWeaponImpl { public abstract void flyImp(); } java-design-patterns-1.9.0/bridge/src/main/java/com/iluwatar/bridge/MagicWeapon.java000066400000000000000000000005501264154357600303530ustar00rootroot00000000000000package com.iluwatar.bridge; /** * * MagicWeapon * */ public abstract class MagicWeapon { protected MagicWeaponImpl imp; public MagicWeapon(MagicWeaponImpl imp) { this.imp = imp; } public abstract void wield(); public abstract void swing(); public abstract void unwield(); public MagicWeaponImpl getImp() { return imp; } } java-design-patterns-1.9.0/bridge/src/main/java/com/iluwatar/bridge/MagicWeaponImpl.java000066400000000000000000000003321264154357600311730ustar00rootroot00000000000000package com.iluwatar.bridge; /** * * MagicWeaponImpl * */ public abstract class MagicWeaponImpl { public abstract void wieldImp(); public abstract void swingImp(); public abstract void unwieldImp(); } java-design-patterns-1.9.0/bridge/src/main/java/com/iluwatar/bridge/Mjollnir.java000066400000000000000000000010151264154357600277440ustar00rootroot00000000000000package com.iluwatar.bridge; /** * * Mjollnir * */ public class Mjollnir extends FlyingMagicWeaponImpl { @Override public void wieldImp() { System.out.println("wielding Mjollnir"); } @Override public void swingImp() { System.out.println("swinging Mjollnir"); } @Override public void unwieldImp() { System.out.println("unwielding Mjollnir"); } @Override public void flyImp() { System.out.println("Mjollnir hits the enemy in the air and returns back to the owner's hand"); } } java-design-patterns-1.9.0/bridge/src/main/java/com/iluwatar/bridge/SoulEatingMagicWeapon.java000066400000000000000000000011061264154357600323440ustar00rootroot00000000000000package com.iluwatar.bridge; /** * * SoulEatingMagicWeapon * */ public class SoulEatingMagicWeapon extends MagicWeapon { public SoulEatingMagicWeapon(SoulEatingMagicWeaponImpl imp) { super(imp); } @Override public SoulEatingMagicWeaponImpl getImp() { return (SoulEatingMagicWeaponImpl) imp; } @Override public void wield() { getImp().wieldImp(); } @Override public void swing() { getImp().swingImp(); } @Override public void unwield() { getImp().unwieldImp(); } public void eatSoul() { getImp().eatSoulImp(); } } java-design-patterns-1.9.0/bridge/src/main/java/com/iluwatar/bridge/SoulEatingMagicWeaponImpl.java000066400000000000000000000002751264154357600331740ustar00rootroot00000000000000package com.iluwatar.bridge; /** * * SoulEatingMagicWeaponImpl * */ public abstract class SoulEatingMagicWeaponImpl extends MagicWeaponImpl { public abstract void eatSoulImp(); } java-design-patterns-1.9.0/bridge/src/main/java/com/iluwatar/bridge/Stormbringer.java000066400000000000000000000010071264154357600306340ustar00rootroot00000000000000package com.iluwatar.bridge; /** * * Stormbringer * */ public class Stormbringer extends SoulEatingMagicWeaponImpl { @Override public void wieldImp() { System.out.println("wielding Stormbringer"); } @Override public void swingImp() { System.out.println("swinging Stormbringer"); } @Override public void unwieldImp() { System.out.println("unwielding Stormbringer"); } @Override public void eatSoulImp() { System.out.println("Stormbringer devours the enemy's soul"); } } java-design-patterns-1.9.0/bridge/src/test/000077500000000000000000000000001264154357600205665ustar00rootroot00000000000000java-design-patterns-1.9.0/bridge/src/test/java/000077500000000000000000000000001264154357600215075ustar00rootroot00000000000000java-design-patterns-1.9.0/bridge/src/test/java/com/000077500000000000000000000000001264154357600222655ustar00rootroot00000000000000java-design-patterns-1.9.0/bridge/src/test/java/com/iluwatar/000077500000000000000000000000001264154357600241155ustar00rootroot00000000000000java-design-patterns-1.9.0/bridge/src/test/java/com/iluwatar/bridge/000077500000000000000000000000001264154357600253515ustar00rootroot00000000000000java-design-patterns-1.9.0/bridge/src/test/java/com/iluwatar/bridge/AppTest.java000066400000000000000000000003021264154357600275670ustar00rootroot00000000000000package com.iluwatar.bridge; import org.junit.Test; /** * * Application test * */ public class AppTest { @Test public void test() { String[] args = {}; App.main(args); } } java-design-patterns-1.9.0/bridge/src/test/java/com/iluwatar/bridge/BlindingMagicWeaponTest.java000066400000000000000000000016611264154357600327210ustar00rootroot00000000000000package com.iluwatar.bridge; import org.junit.Test; import static org.mockito.Mockito.spy; import static org.mockito.Mockito.verify; import static org.mockito.Mockito.verifyNoMoreInteractions; import static org.mockito.internal.verification.VerificationModeFactory.times; /** * Date: 12/6/15 - 11:15 PM * * @author Jeroen Meulemeester */ public class BlindingMagicWeaponTest extends MagicWeaponTest { /** * Invoke all possible actions on the weapon and check if the actions are executed on the actual * underlying weapon implementation. */ @Test public void testExcalibur() throws Exception { final Excalibur excalibur = spy(new Excalibur()); final BlindingMagicWeapon blindingMagicWeapon = new BlindingMagicWeapon(excalibur); testBasicWeaponActions(blindingMagicWeapon, excalibur); blindingMagicWeapon.blind(); verify(excalibur, times(1)).blindImp(); verifyNoMoreInteractions(excalibur); } } java-design-patterns-1.9.0/bridge/src/test/java/com/iluwatar/bridge/FlyingMagicWeaponTest.java000066400000000000000000000016301264154357600324170ustar00rootroot00000000000000package com.iluwatar.bridge; import org.junit.Test; import static org.mockito.Mockito.spy; import static org.mockito.Mockito.verify; import static org.mockito.Mockito.verifyNoMoreInteractions; import static org.mockito.internal.verification.VerificationModeFactory.times; /** * Date: 12/6/15 - 11:26 PM * * @author Jeroen Meulemeester */ public class FlyingMagicWeaponTest extends MagicWeaponTest { /** * Invoke all possible actions on the weapon and check if the actions are executed on the actual * underlying weapon implementation. */ @Test public void testMjollnir() throws Exception { final Mjollnir mjollnir = spy(new Mjollnir()); final FlyingMagicWeapon flyingMagicWeapon = new FlyingMagicWeapon(mjollnir); testBasicWeaponActions(flyingMagicWeapon, mjollnir); flyingMagicWeapon.fly(); verify(mjollnir, times(1)).flyImp(); verifyNoMoreInteractions(mjollnir); } }java-design-patterns-1.9.0/bridge/src/test/java/com/iluwatar/bridge/MagicWeaponTest.java000066400000000000000000000023221264154357600312450ustar00rootroot00000000000000package com.iluwatar.bridge; import static org.junit.Assert.assertNotNull; import static org.mockito.Mockito.verify; import static org.mockito.Mockito.verifyNoMoreInteractions; import static org.mockito.internal.verification.VerificationModeFactory.times; /** * Date: 12/6/15 - 11:28 PM * * @author Jeroen Meulemeester */ public abstract class MagicWeaponTest { /** * Invoke the basic actions of the given weapon, and test if the underlying weapon implementation * is invoked * * @param weaponImpl The spied weapon implementation where actions are bridged to * @param weapon The weapon, handled by the app */ protected final void testBasicWeaponActions(final MagicWeapon weapon, final MagicWeaponImpl weaponImpl) { assertNotNull(weapon); assertNotNull(weaponImpl); assertNotNull(weapon.getImp()); weapon.swing(); verify(weaponImpl, times(1)).swingImp(); verifyNoMoreInteractions(weaponImpl); weapon.wield(); verify(weaponImpl, times(1)).wieldImp(); verifyNoMoreInteractions(weaponImpl); weapon.unwield(); verify(weaponImpl, times(1)).unwieldImp(); verifyNoMoreInteractions(weaponImpl); } } java-design-patterns-1.9.0/bridge/src/test/java/com/iluwatar/bridge/SoulEatingMagicWeaponTest.java000066400000000000000000000017301264154357600332420ustar00rootroot00000000000000package com.iluwatar.bridge; import org.junit.Test; import static org.mockito.Mockito.spy; import static org.mockito.Mockito.verify; import static org.mockito.Mockito.verifyNoMoreInteractions; import static org.mockito.internal.verification.VerificationModeFactory.times; /** * Date: 12/6/15 - 11:43 PM * * @author Jeroen Meulemeester */ public class SoulEatingMagicWeaponTest extends MagicWeaponTest { /** * Invoke all possible actions on the weapon and check if the actions are executed on the actual * underlying weapon implementation. */ @Test public void testStormBringer() throws Exception { final Stormbringer stormbringer = spy(new Stormbringer()); final SoulEatingMagicWeapon soulEatingMagicWeapon = new SoulEatingMagicWeapon(stormbringer); testBasicWeaponActions(soulEatingMagicWeapon, stormbringer); soulEatingMagicWeapon.eatSoul(); verify(stormbringer, times(1)).eatSoulImp(); verifyNoMoreInteractions(stormbringer); } }java-design-patterns-1.9.0/builder/000077500000000000000000000000001264154357600172125ustar00rootroot00000000000000java-design-patterns-1.9.0/builder/.gitignore000066400000000000000000000000111264154357600211720ustar00rootroot00000000000000/target/ java-design-patterns-1.9.0/builder/etc/000077500000000000000000000000001264154357600177655ustar00rootroot00000000000000java-design-patterns-1.9.0/builder/etc/builder.png000066400000000000000000001507631264154357600221350ustar00rootroot00000000000000PNG  IHDR&zѺIDATxal$W~I.|@ 8`g;g]ACX` 7K+K1!#8;2GdNl=Zv6&#CJQkDąpcxC:A?^UuUzU]]^?MM@Ldd 5'$ğD0$@kT~D^;tTAP F@G$ `tTAP F@G$ `tT1RSK$Zd[]Oi7\F@WZd[v؟n7?>7/4l#hmiik%2v:&jq&DR#;('ۏd@"tT)XhvWX{b[J{ì𘸓+9IE $Zcd $Zd@ 5H6 $Zd@ 5H6 $Zd@ 5H6 $ZSzKo<*Ş[eb F@GКrHop?~ٷ֜۟z^Z]͋ $ZS&Ʒ{;?ޫ}빟xg#ك0:*֘.^owzx?Ҿw?uT7d$Zcd_o}y9_}ҷ>SWLJwϺǧ)fcMINod@kLn=߈o3'~߮_k|Qdw#Gzu|vɘd@kLO]=_g>2~+EOmg=js$j7;ݼx62l#h٭G}kS|_Ͻȃ "^[o}k;dǗtTysvۦ F@G%^ Ó/οY{Vb7_zd{?d;i$4 5Kwgx?Z|qq$4y\$xr0:*֘."6'Ͽgמ)ŽgQeh+G( :*֔@Om|.| <.~m'h/AD5S@!Q}j׍/Ϳo/IU"d@kJ#DVd@kl"H6Q&Bd@kl"H6Q&Bd@kl"H6Q&Bd@kl"H6QHɶhh6=m6i7ҝg"d@k쨼t=)l:*LJSgۇ=t 8gc}ud{=fCn-ͥaew>+ّEH6Qf"-BOYmWO_g;˺?V6"M ū<%{{fof魘d0:*LB5Fkg=/sm䖳ʧ6FnU^U\.N+sy!+Mz^$Z3!窕o֒Tgg@neƔJgu6dG˕lH6hM3َ^l:` ʒelO# 5v1&{Tɖ+]+˝挓 Jvp\Ւk4lCGfIжR7wYV= F&ƈ;h:g]$:.:*LJ c0:* D(l#h M0:* D(l#h M0:* D(l#hSOJ 5Sd`L0:* D(l#h M0:* #٧Ƕ?!6GoDd@klGoDd@kF])l#h"vH.i7i皃tޘZl0:*6e۹LH6Qf$.\Sgۇϭ0:*$K^"jnuJ6Nw)Ra%PnS:RZή}l' Z~{֭v]$h@/>'?mVHmS-vXJ3[;m[뇞L;=?2!<#ڶɶd+,= CGК#ٮO4E 5ٕ% $Zd@ 5H6 $Zd@ 5H6 $ZSd+$O܎9JNro>d@k&$يeCa6e۹Y $Z,ٗwo8˪-w[^=1M@cdJ%H6 @k$O_|n~xCli驩ze:xct=z6.ްͶDғzI3% ݦW"/kpcٰOO!H6Q&N/7^q㦸)vHgG{ɥG2]ǧõRjٲmgV~ږiIx8&ّc 1,l#hMd\꽫>֏5qS p2`4+%K6k3l}a$ltTI;/:S 1dK@Z[Ex}ԫҞrV8t%U.ټKCH6Q&YȜEGys ސd@kƒlBQ\x ^1 IH6QfL˔Y~2ZMfBilߐ4d@k+!JH6Q&Bd@kl"H6Q&Bd@kl"H6QɎ\}Q2ßmV3 $Z3!Ɏ[1GgN'dGqvV{[Vթ`Glk!A- AuEUˑlJBGК8ɾ{W}pk8,PS w@]\$Xk#8FP+ZfhNh-G* @k$.$9L[(=pE l9 PEZ,D^4 >~Whݻ~+bC܌3&[ *%w4p=hqWK@*@;vwwgff$[Sw^tcE np .?Lho !jU9UKV=":$QtI]6V,Ä41xR `tTJ͕$;qRcЊ$!|ZXia³Ş[nj5qrrr:N)v2 Of[+T+}dR7ͣ#϶{|dv"DI0:*R׻G϶AP F@GȝđigP71H6 $9"ׁȃ&Bd {u:>>xӀd@ %^IT{kgPltPclkֿ$ z)1F `tT pjkܭ[S{PB 4LH +6wH9dcF F@G /uj ֖3ydɾ{YV]lnqg2Ү8ƘH6QFHvj^]]M31 }/nk7?!6=i[ள_vV)?lbc)߃_ vv[z{3 'Pcg$LQÙ1i'u jC jLCd_z ;oMqS fɴҏvdzmk<'} $mOuE:{m/.!2 *o9d GGGԘ8ɾ{W}pk8,PZf@m] g 9j;$cC 6Ɯ@ 0/u-|+dPc$.>>jLCd?n^/Zbgl7Aj)yD ɞXc $aR eYD|HPɇ_}uw q3r̀l2‰ns*:S^_28VdO1 `tT>^zqqqww jg$S=uEg ?>Ɵdc>.i-\e(#ym̄3|]d1&l#@q4z~~>;AiHa"FX dR F@G겿htz"ڍ2d'NG\0:*TVZ-OA^HጙvJ!zE?m C;U F@G 祮 5!r$dqժjz]N]>1 H6 $PfʊjӀd@ %K]GSԝNԸU4 D(l#@p@A jLM0:*ϡ%q0y/hX\ cOBzj=ۜS F@GqRщAAz]AidKkZIYW7$CPu"1`:m-ۜW F@G#qcTA{{{E0+% gYu1 wwBV0~m/l#ac xw21 }/nk7?!6Ma}4 /,P)5b:톴rx%o/wv嶻+ҳѭH6@ա8뙙E ;zW K|agͽWܸ)n|t~;mUL/^ Yސ44r9glmJ$T{K NyAt^mF*DN] yƬk\wѽ&n"\KÕSD/h S{ +/7 qWeR;bi3 Py)3ћN8~ ^t;.)ZT=_q*k:+ޯ־.EJ#Ej֪H6@塣^xK @w888p{yyYIo=m\ q,vɖ 5\qu5fOyhYሰFH-Z֏5qS쌕pGWYw7Z mm63P jn魐ȭ%E1 PS.~v'j't۫r:A'Ns7/^oݍnse3VHёV?\THdZR#Ձ Pu+;K'X j?O]!n(5pC)'5v쉴h?F:iiX8S=uEg ?:K"VtS %P[yN%;dE&Ӓ2 `tT᥮FBZZM*Lodk1×dO%%$BxBrZ(7L$[.O8`I@ P~O{tG677ԨI[-J'd&Ǝkd4o5&W@Q'Dށdﯮ:݄Ԩ?H6 $֭[hŭ050}3?])l#/'0Z+N> "dϿk^o7F.HH6Q FN]Z#A٠'Ju#l#trN8pJlЙ$;brR \Əsc7 a0:*Ix3$,/7%6X"H;u.|xǔMݝQ F@G0'uf&$Aįikkkqqq~~~aaassSkc8N)cKvPH6QY=MAvΎt:(~܋ _~0҉c3GhZ)fpv w;+3N!|WJDJ~4$]G )BS j4SF$?bOEB5ʈN>-Ĵme7Qd͓$?ܣ8F@ N:P㭭-5IV[ZZ %~'"I/_d? 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import com.iluwatar.builder.Hero.HeroBuilder; /** * * The intention of the Builder pattern is to find a solution to the telescoping constructor * anti-pattern. The telescoping constructor anti-pattern occurs when the increase of object * constructor parameter combination leads to an exponential list of constructors. Instead of using * numerous constructors, the builder pattern uses another object, a builder, that receives each * initialization parameter step by step and then returns the resulting constructed object at once. *

* The Builder pattern has another benefit. It can be used for objects that contain flat data (html * code, SQL query, X.509 certificate...), that is to say, data that can't be easily edited. This * type of data cannot be edited step by step and must be edited at once. The best way to construct * such an object is to use a builder class. *

* In this example we have the Builder pattern variation as described by Joshua Bloch in Effective * Java 2nd Edition. *

* We want to build {@link Hero} objects, but its construction is complex because of the many * parameters needed. To aid the user we introduce {@link HeroBuilder} class. {@link HeroBuilder} * takes the minimum parameters to build {@link Hero} object in its constructor. After that * additional configuration for the {@link Hero} object can be done using the fluent * {@link HeroBuilder} interface. When configuration is ready the build method is called to receive * the final {@link Hero} object. * */ public class App { /** * Program entry point * * @param args command line args */ public static void main(String[] args) { Hero mage = new HeroBuilder(Profession.MAGE, "Riobard").withHairColor(HairColor.BLACK) .withWeapon(Weapon.DAGGER).build(); System.out.println(mage); Hero warrior = new HeroBuilder(Profession.WARRIOR, "Amberjill").withHairColor(HairColor.BLOND) .withHairType(HairType.LONG_CURLY).withArmor(Armor.CHAIN_MAIL).withWeapon(Weapon.SWORD) .build(); System.out.println(warrior); Hero thief = new HeroBuilder(Profession.THIEF, "Desmond").withHairType(HairType.BALD) .withWeapon(Weapon.BOW).build(); System.out.println(thief); } } java-design-patterns-1.9.0/builder/src/main/java/com/iluwatar/builder/Armor.java000066400000000000000000000005061264154357600276260ustar00rootroot00000000000000package com.iluwatar.builder; /** * * Armor enumeration * */ public enum Armor { CLOTHES("clothes"), LEATHER("leather"), CHAIN_MAIL("chain mail"), PLATE_MAIL("plate mail"); private String title; Armor(String title) { this.title = title; } @Override public String toString() { return title; } } java-design-patterns-1.9.0/builder/src/main/java/com/iluwatar/builder/HairColor.java000066400000000000000000000003251264154357600304270ustar00rootroot00000000000000package com.iluwatar.builder; /** * * HairColor enumeration * */ public enum HairColor { WHITE, BLOND, RED, BROWN, BLACK; @Override public String toString() { return name().toLowerCase(); } } java-design-patterns-1.9.0/builder/src/main/java/com/iluwatar/builder/HairType.java000066400000000000000000000005421264154357600302730ustar00rootroot00000000000000package com.iluwatar.builder; /** * * HairType enumeration * */ public enum HairType { BALD("bald"), SHORT("short"), CURLY("curly"), LONG_STRAIGHT("long straight"), LONG_CURLY( "long curly"); private String title; HairType(String title) { this.title = title; } @Override public String toString() { return title; } } java-design-patterns-1.9.0/builder/src/main/java/com/iluwatar/builder/Hero.java000066400000000000000000000052671264154357600274540ustar00rootroot00000000000000package com.iluwatar.builder; /** * * Hero, the class with many parameters. * */ public class Hero { private final Profession profession; private final String name; private final HairType hairType; private final HairColor hairColor; private final Armor armor; private final Weapon weapon; public Profession getProfession() { return profession; } public String getName() { return name; } public HairType getHairType() { return hairType; } public HairColor getHairColor() { return hairColor; } public Armor getArmor() { return armor; } public Weapon getWeapon() { return weapon; } @Override public String toString() { StringBuilder sb = new StringBuilder(); sb.append("This is a "); sb.append(profession); sb.append(" named "); sb.append(name); if (hairColor != null || hairType != null) { sb.append(" with "); if (hairColor != null) { sb.append(hairColor); sb.append(" "); } if (hairType != null) { sb.append(hairType); sb.append(" "); } sb.append(hairType != HairType.BALD ? "hair" : "head"); } if (armor != null) { sb.append(" wearing "); sb.append(armor); } if (weapon != null) { sb.append(" and wielding a "); sb.append(weapon); } sb.append("."); return sb.toString(); } private Hero(HeroBuilder builder) { this.profession = builder.profession; this.name = builder.name; this.hairColor = builder.hairColor; this.hairType = builder.hairType; this.weapon = builder.weapon; this.armor = builder.armor; } /** * * The builder class. * */ public static class HeroBuilder { private final Profession profession; private final String name; private HairType hairType; private HairColor hairColor; private Armor armor; private Weapon weapon; /** * Constructor */ public HeroBuilder(Profession profession, String name) { if (profession == null || name == null) { throw new IllegalArgumentException("profession and name can not be null"); } this.profession = profession; this.name = name; } public HeroBuilder withHairType(HairType hairType) { this.hairType = hairType; return this; } public HeroBuilder withHairColor(HairColor hairColor) { this.hairColor = hairColor; return this; } public HeroBuilder withArmor(Armor armor) { this.armor = armor; return this; } public HeroBuilder withWeapon(Weapon weapon) { this.weapon = weapon; return this; } public Hero build() { return new Hero(this); } } } java-design-patterns-1.9.0/builder/src/main/java/com/iluwatar/builder/Profession.java000066400000000000000000000003231264154357600306720ustar00rootroot00000000000000package com.iluwatar.builder; /** * * Profession enumeration * */ public enum Profession { WARRIOR, THIEF, MAGE, PRIEST; @Override public String toString() { return name().toLowerCase(); } } java-design-patterns-1.9.0/builder/src/main/java/com/iluwatar/builder/Weapon.java000066400000000000000000000003211264154357600277720ustar00rootroot00000000000000package com.iluwatar.builder; /** * * Weapon enumeration * */ public enum Weapon { DAGGER, SWORD, AXE, WARHAMMER, BOW; @Override public String toString() { return name().toLowerCase(); } } java-design-patterns-1.9.0/builder/src/test/000077500000000000000000000000001264154357600207605ustar00rootroot00000000000000java-design-patterns-1.9.0/builder/src/test/java/000077500000000000000000000000001264154357600217015ustar00rootroot00000000000000java-design-patterns-1.9.0/builder/src/test/java/com/000077500000000000000000000000001264154357600224575ustar00rootroot00000000000000java-design-patterns-1.9.0/builder/src/test/java/com/iluwatar/000077500000000000000000000000001264154357600243075ustar00rootroot00000000000000java-design-patterns-1.9.0/builder/src/test/java/com/iluwatar/builder/000077500000000000000000000000001264154357600257355ustar00rootroot00000000000000java-design-patterns-1.9.0/builder/src/test/java/com/iluwatar/builder/AppTest.java000066400000000000000000000003031264154357600301540ustar00rootroot00000000000000package com.iluwatar.builder; import org.junit.Test; /** * * Application test * */ public class AppTest { @Test public void test() { String[] args = {}; App.main(args); } } java-design-patterns-1.9.0/builder/src/test/java/com/iluwatar/builder/HeroTest.java000066400000000000000000000031031264154357600303320ustar00rootroot00000000000000package com.iluwatar.builder; import org.junit.Test; import static org.junit.Assert.assertEquals; import static org.junit.Assert.assertNotNull; /** * Date: 12/6/15 - 11:01 PM * * @author Jeroen Meulemeester */ public class HeroTest { /** * Test if we get the expected exception when trying to create a hero without a profession */ @Test(expected = IllegalArgumentException.class) public void testMissingProfession() throws Exception { new Hero.HeroBuilder(null, "Sir without a job"); } /** * Test if we get the expected exception when trying to create a hero without a name */ @Test(expected = IllegalArgumentException.class) public void testMissingName() throws Exception { new Hero.HeroBuilder(Profession.THIEF, null); } /** * Test if the hero build by the builder has the correct attributes, as requested */ @Test public void testBuildHero() throws Exception { final String heroName = "Sir Lancelot"; final Hero hero = new Hero.HeroBuilder(Profession.WARRIOR, heroName) .withArmor(Armor.CHAIN_MAIL) .withWeapon(Weapon.SWORD) .withHairType(HairType.LONG_CURLY) .withHairColor(HairColor.BLOND) .build(); assertNotNull(hero); assertNotNull(hero.toString()); assertEquals(Profession.WARRIOR, hero.getProfession()); assertEquals(heroName, hero.getName()); assertEquals(Armor.CHAIN_MAIL, hero.getArmor()); assertEquals(Weapon.SWORD, hero.getWeapon()); assertEquals(HairType.LONG_CURLY, hero.getHairType()); assertEquals(HairColor.BLOND, hero.getHairColor()); } }java-design-patterns-1.9.0/business-delegate/000077500000000000000000000000001264154357600211675ustar00rootroot00000000000000java-design-patterns-1.9.0/business-delegate/etc/000077500000000000000000000000001264154357600217425ustar00rootroot00000000000000java-design-patterns-1.9.0/business-delegate/etc/business-delegate.png000066400000000000000000000573331264154357600260660ustar00rootroot00000000000000PNG  IHDRl^IDATxm\ř.Xj7qxcP K@Zt JK- -um`$ڱt+fba7BĎufڬoTe9OTʓ'O73W `  Bm536@MtY;.e` ;B>TH -BNlRwB` }TTS~1ZsC PV!4f,DB> *:%VCMM{1ӜZ6Al`Wt@#lMyqscp=)nG:q#9$(7҅CP, &uK$qdJcq¢< jEY7RDT5j w&Uf$ !Qr@] T"mIsTv3\#:ЇҤʃ OY0(rtiiwB-#E qHލr q!ܟ#j^K0ftL0>4K0 f &L&I2sd@B=lq"I8U4ϑqP!jP!j* PP!u'T ;B>TH -BNlRwB` }_U7o~b6m8P!jKG]OLdW2RN,>bB` }T{gv_}_|l {?rUI?Z rwuP!j3rO~kN>Wy^+mf:-DC cұG̿z[9s?;v={q|!|?',hѦIřBp}T5nkOwƟbȯ`KOx[Y(~(VNNW[FѤsP!ŀL\oo\3{ ;/?v}b\&}YbQ+lLc#\[vby'y_^Ζ~(=2ܙ *}T/kq}~gOv|,%HRѩqN "{@l ]smݾvɎY"A"tT*z5f Vl ]3=r[۟coc> -|U!`Y PP!u'T ;B>TH -BNlRwB` }*[@@ԝP!j6*5LGLy B` }ڨP!"B>*$و.% ]nG4'\zǤ\ "qoh^H|_fLn^C/}6inm5V*[@8B8AN+,u@k.  q @.IeɁr6R P#i&?,'…{皪{*4|jf\)g}证 PۡApB"|F}B JgduP!jab(V{xA"H&?jDJ$ Pyh-׌ WpqQ \ƷC\4Y -U!KdLH(21R5DHRo3_i2V,T}U8 B` }*[@@ԝP!j* PP!u'T ;B>@wŊ6m  ;` }*[@@ԝP!j* PZw`t*Rw6 PP!u'T ;B>@!ҽ?'ϭ7`) PTn 쯎'X B>@a]j'T(C,O5y9.pk?5IFִ VF~2˶H7JP!j`Fڎl7c!2H*_; 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By using the pattern we gain loose coupling between the tiers and encapsulate knowledge about how to locate, connect to, and interact with the business objects that make up the application. ![alt text](./etc/business-delegate.png "Business Delegate") **Applicability:** Use the Business Delegate pattern when * you want loose coupling between presentation and business tiers * you want to orchestrate calls to multiple business services * you want to encapsulate service lookups and service calls java-design-patterns-1.9.0/business-delegate/pom.xml000066400000000000000000000013301264154357600225010ustar00rootroot00000000000000 4.0.0 com.iluwatar java-design-patterns 1.9.0 business-delegate junit junit test org.mockito mockito-core test java-design-patterns-1.9.0/business-delegate/src/000077500000000000000000000000001264154357600217565ustar00rootroot00000000000000java-design-patterns-1.9.0/business-delegate/src/main/000077500000000000000000000000001264154357600227025ustar00rootroot00000000000000java-design-patterns-1.9.0/business-delegate/src/main/java/000077500000000000000000000000001264154357600236235ustar00rootroot00000000000000java-design-patterns-1.9.0/business-delegate/src/main/java/com/000077500000000000000000000000001264154357600244015ustar00rootroot00000000000000java-design-patterns-1.9.0/business-delegate/src/main/java/com/iluwatar/000077500000000000000000000000001264154357600262315ustar00rootroot00000000000000java-design-patterns-1.9.0/business-delegate/src/main/java/com/iluwatar/business/000077500000000000000000000000001264154357600300645ustar00rootroot00000000000000java-design-patterns-1.9.0/business-delegate/src/main/java/com/iluwatar/business/delegate/000077500000000000000000000000001264154357600316365ustar00rootroot00000000000000java-design-patterns-1.9.0/business-delegate/src/main/java/com/iluwatar/business/delegate/App.java000066400000000000000000000027521264154357600332270ustar00rootroot00000000000000package com.iluwatar.business.delegate; /** * The Business Delegate pattern adds an abstraction layer between the presentation and business * tiers. By using the pattern we gain loose coupling between the tiers. The Business Delegate * encapsulates knowledge about how to locate, connect to, and interact with the business objects * that make up the application. * *

Some of the services the Business Delegate uses are instantiated directly, and some can be * retrieved through service lookups. The Business Delegate itself may contain business logic too * potentially tying together multiple service calls, exception handling, retrying etc. * *

In this example the client ({@link Client}) utilizes a business delegate ( * {@link BusinessDelegate}) to execute a task. The Business Delegate then selects the appropriate * service and makes the service call. */ public class App { /** * Program entry point. * * @param args command line args */ public static void main(String[] args) { BusinessDelegate businessDelegate = new BusinessDelegate(); BusinessLookup businessLookup = new BusinessLookup(); businessLookup.setEjbService(new EjbService()); businessLookup.setJmsService(new JmsService()); businessDelegate.setLookupService(businessLookup); businessDelegate.setServiceType(ServiceType.EJB); Client client = new Client(businessDelegate); client.doTask(); businessDelegate.setServiceType(ServiceType.JMS); client.doTask(); } } BusinessDelegate.java000066400000000000000000000011421264154357600356460ustar00rootroot00000000000000java-design-patterns-1.9.0/business-delegate/src/main/java/com/iluwatar/business/delegatepackage com.iluwatar.business.delegate; /** * BusinessDelegate separates the presentation and business tiers */ public class BusinessDelegate { private BusinessLookup lookupService; private BusinessService businessService; private ServiceType serviceType; public void setLookupService(BusinessLookup businessLookup) { this.lookupService = businessLookup; } public void setServiceType(ServiceType serviceType) { this.serviceType = serviceType; } public void doTask() { businessService = lookupService.getBusinessService(serviceType); businessService.doProcessing(); } } BusinessLookup.java000066400000000000000000000012421264154357600354060ustar00rootroot00000000000000java-design-patterns-1.9.0/business-delegate/src/main/java/com/iluwatar/business/delegatepackage com.iluwatar.business.delegate; /** * Class for performing service lookups. */ public class BusinessLookup { private EjbService ejbService; private JmsService jmsService; /** * @param serviceType Type of service instance to be returned. * @return Service instance. */ public BusinessService getBusinessService(ServiceType serviceType) { if (serviceType.equals(ServiceType.EJB)) { return ejbService; } else { return jmsService; } } public void setJmsService(JmsService jmsService) { this.jmsService = jmsService; } public void setEjbService(EjbService ejbService) { this.ejbService = ejbService; } } BusinessService.java000066400000000000000000000002361264154357600355370ustar00rootroot00000000000000java-design-patterns-1.9.0/business-delegate/src/main/java/com/iluwatar/business/delegatepackage com.iluwatar.business.delegate; /** * * Interface for service implementations * */ public interface BusinessService { void doProcessing(); } Client.java000066400000000000000000000005411264154357600336400ustar00rootroot00000000000000java-design-patterns-1.9.0/business-delegate/src/main/java/com/iluwatar/business/delegatepackage com.iluwatar.business.delegate; /** * * Client utilizes BusinessDelegate to call the business tier * */ public class Client { private BusinessDelegate businessDelegate; public Client(BusinessDelegate businessDelegate) { this.businessDelegate = businessDelegate; } public void doTask() { businessDelegate.doTask(); } } EjbService.java000066400000000000000000000003651264154357600344470ustar00rootroot00000000000000java-design-patterns-1.9.0/business-delegate/src/main/java/com/iluwatar/business/delegatepackage com.iluwatar.business.delegate; /** * * Service EJB implementation * */ public class EjbService implements BusinessService { @Override public void doProcessing() { System.out.println("EjbService is now processing"); } } JmsService.java000066400000000000000000000003651264154357600345000ustar00rootroot00000000000000java-design-patterns-1.9.0/business-delegate/src/main/java/com/iluwatar/business/delegatepackage com.iluwatar.business.delegate; /** * * Service JMS implementation * */ public class JmsService implements BusinessService { @Override public void doProcessing() { System.out.println("JmsService is now processing"); } } ServiceType.java000066400000000000000000000002021264154357600346560ustar00rootroot00000000000000java-design-patterns-1.9.0/business-delegate/src/main/java/com/iluwatar/business/delegatepackage com.iluwatar.business.delegate; /** * * Enumeration for service types * */ public enum ServiceType { EJB, JMS; } java-design-patterns-1.9.0/business-delegate/src/test/000077500000000000000000000000001264154357600227355ustar00rootroot00000000000000java-design-patterns-1.9.0/business-delegate/src/test/java/000077500000000000000000000000001264154357600236565ustar00rootroot00000000000000java-design-patterns-1.9.0/business-delegate/src/test/java/com/000077500000000000000000000000001264154357600244345ustar00rootroot00000000000000java-design-patterns-1.9.0/business-delegate/src/test/java/com/iluwatar/000077500000000000000000000000001264154357600262645ustar00rootroot00000000000000java-design-patterns-1.9.0/business-delegate/src/test/java/com/iluwatar/business/000077500000000000000000000000001264154357600301175ustar00rootroot00000000000000java-design-patterns-1.9.0/business-delegate/src/test/java/com/iluwatar/business/delegate/000077500000000000000000000000001264154357600316715ustar00rootroot00000000000000BusinessDelegateTest.java000066400000000000000000000046511264154357600365510ustar00rootroot00000000000000java-design-patterns-1.9.0/business-delegate/src/test/java/com/iluwatar/business/delegatepackage com.iluwatar.business.delegate; import static org.mockito.Mockito.spy; import static org.mockito.Mockito.times; import static org.mockito.Mockito.verify; import org.junit.Before; import org.junit.Test; /** * The Business Delegate pattern adds an abstraction layer between the presentation and business * tiers. By using the pattern we gain loose coupling between the tiers. The Business Delegate * encapsulates knowledge about how to locate, connect to, and interact with the business objects * that make up the application. * *

Some of the services the Business Delegate uses are instantiated directly, and some can be * retrieved through service lookups. The Business Delegate itself may contain business logic too * potentially tying together multiple service calls, exception handling, retrying etc. */ public class BusinessDelegateTest { private EjbService ejbService; private JmsService jmsService; private BusinessLookup businessLookup; private BusinessDelegate businessDelegate; /** * This method sets up the instance variables of this test class. It is executed before the * execution of every test. */ @Before public void setup() { ejbService = spy(new EjbService()); jmsService = spy(new JmsService()); businessLookup = spy(new BusinessLookup()); businessLookup.setEjbService(ejbService); businessLookup.setJmsService(jmsService); businessDelegate = spy(new BusinessDelegate()); businessDelegate.setLookupService(businessLookup); } /** * In this example the client ({@link Client}) utilizes a business delegate ( * {@link BusinessDelegate}) to execute a task. The Business Delegate then selects the appropriate * service and makes the service call. */ @Test public void testBusinessDelegate() { // setup a client object Client client = new Client(businessDelegate); // set the service type businessDelegate.setServiceType(ServiceType.EJB); // action client.doTask(); // verifying that the businessDelegate was used by client during doTask() method. verify(businessDelegate).doTask(); verify(ejbService).doProcessing(); // set the service type businessDelegate.setServiceType(ServiceType.JMS); // action client.doTask(); // verifying that the businessDelegate was used by client during doTask() method. verify(businessDelegate, times(2)).doTask(); verify(jmsService).doProcessing(); } } java-design-patterns-1.9.0/caching/000077500000000000000000000000001264154357600171605ustar00rootroot00000000000000java-design-patterns-1.9.0/caching/.gitignore000066400000000000000000000000111264154357600211400ustar00rootroot00000000000000/target/ java-design-patterns-1.9.0/caching/etc/000077500000000000000000000000001264154357600177335ustar00rootroot00000000000000java-design-patterns-1.9.0/caching/etc/caching.png000066400000000000000000001556521264154357600220530ustar00rootroot00000000000000PNG  IHDRse)qIDATxmՙ&L΀mBmQ@( K6X6kImPc"tm1p`vDtԞ8YYy2y )ɓ'ۗpĔW$ۖp$f! 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The resources retain their identity, are kept in some fast-access storage, and are re-used to avoid having to acquire them again. ![alt text](./etc/caching.png "Caching") **Applicability:** Use the Caching pattern(s) when * Repetitious acquisition, initialization, and release of the same resource causes unnecessary performance overhead. **Credits** * [Write-through, write-around, write-back: Cache explained](http://www.computerweekly.com/feature/Write-through-write-around-write-back-Cache-explained) * [Read-Through, Write-Through, Write-Behind, and Refresh-Ahead Caching](https://docs.oracle.com/cd/E15357_01/coh.360/e15723/cache_rtwtwbra.htm#COHDG5177) java-design-patterns-1.9.0/caching/pom.xml000066400000000000000000000033451264154357600205020ustar00rootroot00000000000000 4.0.0 com.iluwatar java-design-patterns 1.9.0 caching junit junit test org.mongodb mongodb-driver 3.0.4 org.mongodb mongodb-driver-core 3.0.4 org.mongodb bson 3.0.4 org.apache.maven.plugins maven-surefire-plugin 2.19 false java-design-patterns-1.9.0/caching/src/000077500000000000000000000000001264154357600177475ustar00rootroot00000000000000java-design-patterns-1.9.0/caching/src/main/000077500000000000000000000000001264154357600206735ustar00rootroot00000000000000java-design-patterns-1.9.0/caching/src/main/java/000077500000000000000000000000001264154357600216145ustar00rootroot00000000000000java-design-patterns-1.9.0/caching/src/main/java/com/000077500000000000000000000000001264154357600223725ustar00rootroot00000000000000java-design-patterns-1.9.0/caching/src/main/java/com/iluwatar/000077500000000000000000000000001264154357600242225ustar00rootroot00000000000000java-design-patterns-1.9.0/caching/src/main/java/com/iluwatar/caching/000077500000000000000000000000001264154357600256165ustar00rootroot00000000000000java-design-patterns-1.9.0/caching/src/main/java/com/iluwatar/caching/App.java000066400000000000000000000121531264154357600272030ustar00rootroot00000000000000package com.iluwatar.caching; /** * * The Caching pattern describes how to avoid expensive re-acquisition of resources by not releasing * the resources immediately after their use. The resources retain their identity, are kept in some * fast-access storage, and are re-used to avoid having to acquire them again. There are three main * caching strategies/techniques in this pattern; each with their own pros and cons. They are: * write-through which writes data to the cache and DB in a single transaction, * write-around which writes data immediately into the DB instead of the cache, and * write-behind which writes data into the cache initially whilst the data is only * written into the DB when the cache is full. The read-through strategy is also * included in the mentioned three strategies -- returns data from the cache to the caller if * it exists else queries from DB and stores it into the cache for future use. These * strategies determine when the data in the cache should be written back to the backing store (i.e. * Database) and help keep both data sources synchronized/up-to-date. This pattern can improve * performance and also helps to maintain consistency between data held in the cache and the data in * the underlying data store. *

* In this example, the user account ({@link UserAccount}) entity is used as the underlying * application data. The cache itself is implemented as an internal (Java) data structure. It adopts * a Least-Recently-Used (LRU) strategy for evicting data from itself when its full. The three * strategies are individually tested. The testing of the cache is restricted towards saving and * querying of user accounts from the underlying data store ( {@link DbManager}). The main class ( * {@link App} is not aware of the underlying mechanics of the application (i.e. save and query) and * whether the data is coming from the cache or the DB (i.e. separation of concern). The AppManager * ({@link AppManager}) handles the transaction of data to-and-from the underlying data store * (depending on the preferred caching policy/strategy). * * App --> AppManager --> CacheStore/LRUCache/CachingPolicy --> DBManager *

* * @see CacheStore * @See LRUCache * @see CachingPolicy * */ public class App { /** * Program entry point * * @param args command line args */ public static void main(String[] args) { AppManager.initDb(false); // VirtualDB (instead of MongoDB) was used in running the JUnit tests // and the App class to avoid Maven compilation errors. Set flag to // true to run the tests with MongoDB (provided that MongoDB is // installed and socket connection is open). AppManager.initCacheCapacity(3); App app = new App(); app.useReadAndWriteThroughStrategy(); app.useReadThroughAndWriteAroundStrategy(); app.useReadThroughAndWriteBehindStrategy(); } /** * Read-through and write-through */ public void useReadAndWriteThroughStrategy() { System.out.println("# CachingPolicy.THROUGH"); AppManager.initCachingPolicy(CachingPolicy.THROUGH); UserAccount userAccount1 = new UserAccount("001", "John", "He is a boy."); AppManager.save(userAccount1); System.out.println(AppManager.printCacheContent()); AppManager.find("001"); AppManager.find("001"); } /** * Read-through and write-around */ public void useReadThroughAndWriteAroundStrategy() { System.out.println("# CachingPolicy.AROUND"); AppManager.initCachingPolicy(CachingPolicy.AROUND); UserAccount userAccount2 = new UserAccount("002", "Jane", "She is a girl."); AppManager.save(userAccount2); System.out.println(AppManager.printCacheContent()); AppManager.find("002"); System.out.println(AppManager.printCacheContent()); userAccount2 = AppManager.find("002"); userAccount2.setUserName("Jane G."); AppManager.save(userAccount2); System.out.println(AppManager.printCacheContent()); AppManager.find("002"); System.out.println(AppManager.printCacheContent()); AppManager.find("002"); } /** * Read-through and write-behind */ public void useReadThroughAndWriteBehindStrategy() { System.out.println("# CachingPolicy.BEHIND"); AppManager.initCachingPolicy(CachingPolicy.BEHIND); UserAccount userAccount3 = new UserAccount("003", "Adam", "He likes food."); UserAccount userAccount4 = new UserAccount("004", "Rita", "She hates cats."); UserAccount userAccount5 = new UserAccount("005", "Isaac", "He is allergic to mustard."); AppManager.save(userAccount3); AppManager.save(userAccount4); AppManager.save(userAccount5); System.out.println(AppManager.printCacheContent()); AppManager.find("003"); System.out.println(AppManager.printCacheContent()); UserAccount userAccount6 = new UserAccount("006", "Yasha", "She is an only child."); AppManager.save(userAccount6); System.out.println(AppManager.printCacheContent()); AppManager.find("004"); System.out.println(AppManager.printCacheContent()); } } java-design-patterns-1.9.0/caching/src/main/java/com/iluwatar/caching/AppManager.java000066400000000000000000000045431264154357600305020ustar00rootroot00000000000000package com.iluwatar.caching; import java.text.ParseException; /** * * AppManager helps to bridge the gap in communication between the main class and the application's * back-end. DB connection is initialized through this class. The chosen caching strategy/policy is * also initialized here. Before the cache can be used, the size of the cache has to be set. * Depending on the chosen caching policy, AppManager will call the appropriate function in the * CacheStore class. * */ public class AppManager { private static CachingPolicy cachingPolicy; private AppManager() { } /** * * Developer/Tester is able to choose whether the application should use MongoDB as its underlying * data storage or a simple Java data structure to (temporarily) store the data/objects during * runtime. */ public static void initDb(boolean useMongoDb) { if (useMongoDb) { try { DbManager.connect(); } catch (ParseException e) { e.printStackTrace(); } } else { DbManager.createVirtualDb(); } } /** * Initialize caching policy */ public static void initCachingPolicy(CachingPolicy policy) { cachingPolicy = policy; if (cachingPolicy == CachingPolicy.BEHIND) { Runtime.getRuntime().addShutdownHook(new Thread(new Runnable() { @Override public void run() { CacheStore.flushCache(); } })); } CacheStore.clearCache(); } public static void initCacheCapacity(int capacity) { CacheStore.initCapacity(capacity); } /** * Find user account */ public static UserAccount find(String userId) { if (cachingPolicy == CachingPolicy.THROUGH || cachingPolicy == CachingPolicy.AROUND) { return CacheStore.readThrough(userId); } else if (cachingPolicy == CachingPolicy.BEHIND) { return CacheStore.readThroughWithWriteBackPolicy(userId); } return null; } /** * Save user account */ public static void save(UserAccount userAccount) { if (cachingPolicy == CachingPolicy.THROUGH) { CacheStore.writeThrough(userAccount); } else if (cachingPolicy == CachingPolicy.AROUND) { CacheStore.writeAround(userAccount); } else if (cachingPolicy == CachingPolicy.BEHIND) { CacheStore.writeBehind(userAccount); } } public static String printCacheContent() { return CacheStore.print(); } } java-design-patterns-1.9.0/caching/src/main/java/com/iluwatar/caching/CacheStore.java000066400000000000000000000067231264154357600305110ustar00rootroot00000000000000package com.iluwatar.caching; import java.util.ArrayList; /** * * The caching strategies are implemented in this class. * */ public class CacheStore { static LruCache cache = null; private CacheStore() { } /** * Init cache capacity */ public static void initCapacity(int capacity) { if (null == cache) { cache = new LruCache(capacity); } else { cache.setCapacity(capacity); } } /** * Get user account using read-through cache */ public static UserAccount readThrough(String userId) { if (cache.contains(userId)) { System.out.println("# Cache Hit!"); return cache.get(userId); } System.out.println("# Cache Miss!"); UserAccount userAccount = DbManager.readFromDb(userId); cache.set(userId, userAccount); return userAccount; } /** * Get user account using write-through cache */ public static void writeThrough(UserAccount userAccount) { if (cache.contains(userAccount.getUserId())) { DbManager.updateDb(userAccount); } else { DbManager.writeToDb(userAccount); } cache.set(userAccount.getUserId(), userAccount); } /** * Get user account using write-around cache */ public static void writeAround(UserAccount userAccount) { if (cache.contains(userAccount.getUserId())) { DbManager.updateDb(userAccount); cache.invalidate(userAccount.getUserId()); // Cache data has been updated -- remove older // version from cache. } else { DbManager.writeToDb(userAccount); } } /** * Get user account using read-through cache with write-back policy */ public static UserAccount readThroughWithWriteBackPolicy(String userId) { if (cache.contains(userId)) { System.out.println("# Cache Hit!"); return cache.get(userId); } System.out.println("# Cache Miss!"); UserAccount userAccount = DbManager.readFromDb(userId); if (cache.isFull()) { System.out.println("# Cache is FULL! Writing LRU data to DB..."); UserAccount toBeWrittenToDb = cache.getLruData(); DbManager.upsertDb(toBeWrittenToDb); } cache.set(userId, userAccount); return userAccount; } /** * Set user account */ public static void writeBehind(UserAccount userAccount) { if (cache.isFull() && !cache.contains(userAccount.getUserId())) { System.out.println("# Cache is FULL! Writing LRU data to DB..."); UserAccount toBeWrittenToDb = cache.getLruData(); DbManager.upsertDb(toBeWrittenToDb); } cache.set(userAccount.getUserId(), userAccount); } /** * Clears cache */ public static void clearCache() { if (null != cache) { cache.clear(); } } /** * Writes remaining content in the cache into the DB. */ public static void flushCache() { System.out.println("# flushCache..."); if (null == cache) { return; } ArrayList listOfUserAccounts = cache.getCacheDataInListForm(); for (UserAccount userAccount : listOfUserAccounts) { DbManager.upsertDb(userAccount); } } /** * Print user accounts */ public static String print() { ArrayList listOfUserAccounts = cache.getCacheDataInListForm(); StringBuilder sb = new StringBuilder(); sb.append("\n--CACHE CONTENT--\n"); for (UserAccount userAccount : listOfUserAccounts) { sb.append(userAccount.toString() + "\n"); } sb.append("----\n"); return sb.toString(); } } java-design-patterns-1.9.0/caching/src/main/java/com/iluwatar/caching/CachingPolicy.java000066400000000000000000000005571264154357600312040ustar00rootroot00000000000000package com.iluwatar.caching; /** * * Enum class containing the three caching strategies implemented in the pattern. * */ public enum CachingPolicy { THROUGH("through"), AROUND("around"), BEHIND("behind"); private String policy; private CachingPolicy(String policy) { this.policy = policy; } public String getPolicy() { return policy; } } java-design-patterns-1.9.0/caching/src/main/java/com/iluwatar/caching/DbManager.java000066400000000000000000000075411264154357600303100ustar00rootroot00000000000000package com.iluwatar.caching; import java.text.ParseException; import java.util.HashMap; import org.bson.Document; import com.mongodb.MongoClient; import com.mongodb.client.FindIterable; import com.mongodb.client.MongoDatabase; import com.mongodb.client.model.UpdateOptions; /** * *

DBManager handles the communication with the underlying data store i.e. Database. It contains the * implemented methods for querying, inserting, and updating data. MongoDB was used as the database * for the application.

* *

Developer/Tester is able to choose whether the application should use MongoDB as its underlying * data storage (connect()) or a simple Java data structure to (temporarily) store the data/objects * during runtime (createVirtualDB()).

* */ public class DbManager { private static MongoClient mongoClient; private static MongoDatabase db; private static boolean useMongoDB; private static HashMap virtualDB; private DbManager() { } /** * Create DB */ public static void createVirtualDb() { useMongoDB = false; virtualDB = new HashMap(); } /** * Connect to DB */ public static void connect() throws ParseException { useMongoDB = true; mongoClient = new MongoClient(); db = mongoClient.getDatabase("test"); } /** * Read user account from DB */ public static UserAccount readFromDb(String userId) { if (!useMongoDB) { if (virtualDB.containsKey(userId)) { return virtualDB.get(userId); } return null; } if (null == db) { try { connect(); } catch (ParseException e) { e.printStackTrace(); } } FindIterable iterable = db.getCollection("user_accounts").find(new Document("userID", userId)); if (iterable == null) { return null; } Document doc = iterable.first(); UserAccount userAccount = new UserAccount(userId, doc.getString("userName"), doc.getString("additionalInfo")); return userAccount; } /** * Write user account to DB */ public static void writeToDb(UserAccount userAccount) { if (!useMongoDB) { virtualDB.put(userAccount.getUserId(), userAccount); return; } if (null == db) { try { connect(); } catch (ParseException e) { e.printStackTrace(); } } db.getCollection("user_accounts").insertOne( new Document("userID", userAccount.getUserId()).append("userName", userAccount.getUserName()).append("additionalInfo", userAccount.getAdditionalInfo())); } /** * Update DB */ public static void updateDb(UserAccount userAccount) { if (!useMongoDB) { virtualDB.put(userAccount.getUserId(), userAccount); return; } if (null == db) { try { connect(); } catch (ParseException e) { e.printStackTrace(); } } db.getCollection("user_accounts").updateOne( new Document("userID", userAccount.getUserId()), new Document("$set", new Document("userName", userAccount.getUserName()).append( "additionalInfo", userAccount.getAdditionalInfo()))); } /** * * Insert data into DB if it does not exist. Else, update it. */ public static void upsertDb(UserAccount userAccount) { if (!useMongoDB) { virtualDB.put(userAccount.getUserId(), userAccount); return; } if (null == db) { try { connect(); } catch (ParseException e) { e.printStackTrace(); } } db.getCollection("user_accounts").updateOne( new Document("userID", userAccount.getUserId()), new Document("$set", new Document("userID", userAccount.getUserId()).append("userName", userAccount.getUserName()).append("additionalInfo", userAccount.getAdditionalInfo())), new UpdateOptions().upsert(true)); } } java-design-patterns-1.9.0/caching/src/main/java/com/iluwatar/caching/LruCache.java000066400000000000000000000072461264154357600301600ustar00rootroot00000000000000package com.iluwatar.caching; import java.util.ArrayList; import java.util.HashMap; /** * * Data structure/implementation of the application's cache. The data structure consists of a hash * table attached with a doubly linked-list. The linked-list helps in capturing and maintaining the * LRU data in the cache. When a data is queried (from the cache), added (to the cache), or updated, * the data is moved to the front of the list to depict itself as the most-recently-used data. The * LRU data is always at the end of the list. * */ public class LruCache { class Node { String userId; UserAccount userAccount; Node previous; Node next; public Node(String userId, UserAccount userAccount) { this.userId = userId; this.userAccount = userAccount; } } int capacity; HashMap cache = new HashMap(); Node head = null; Node end = null; public LruCache(int capacity) { this.capacity = capacity; } /** * Get user account */ public UserAccount get(String userId) { if (cache.containsKey(userId)) { Node node = cache.get(userId); remove(node); setHead(node); return node.userAccount; } return null; } /** * * Remove node from linked list. */ public void remove(Node node) { if (node.previous != null) { node.previous.next = node.next; } else { head = node.next; } if (node.next != null) { node.next.previous = node.previous; } else { end = node.previous; } } /** * * Move node to the front of the list. */ public void setHead(Node node) { node.next = head; node.previous = null; if (head != null) { head.previous = node; } head = node; if (end == null) { end = head; } } /** * Set user account */ public void set(String userId, UserAccount userAccount) { if (cache.containsKey(userId)) { Node old = cache.get(userId); old.userAccount = userAccount; remove(old); setHead(old); } else { Node newNode = new Node(userId, userAccount); if (cache.size() >= capacity) { System.out.println("# Cache is FULL! Removing " + end.userId + " from cache..."); cache.remove(end.userId); // remove LRU data from cache. remove(end); setHead(newNode); } else { setHead(newNode); } cache.put(userId, newNode); } } public boolean contains(String userId) { return cache.containsKey(userId); } /** * Invalidate cache for user */ public void invalidate(String userId) { System.out.println("# " + userId + " has been updated! Removing older version from cache..."); Node toBeRemoved = cache.get(userId); remove(toBeRemoved); cache.remove(userId); } public boolean isFull() { return cache.size() >= capacity; } public UserAccount getLruData() { return end.userAccount; } /** * Clear cache */ public void clear() { head = null; end = null; cache.clear(); } /** * * Returns cache data in list form. */ public ArrayList getCacheDataInListForm() { ArrayList listOfCacheData = new ArrayList(); Node temp = head; while (temp != null) { listOfCacheData.add(temp.userAccount); temp = temp.next; } return listOfCacheData; } /** * Set cache capacity */ public void setCapacity(int newCapacity) { if (capacity > newCapacity) { clear(); // Behavior can be modified to accommodate for decrease in cache size. For now, we'll // just clear the cache. } else { this.capacity = newCapacity; } } } java-design-patterns-1.9.0/caching/src/main/java/com/iluwatar/caching/UserAccount.java000066400000000000000000000017241264154357600307200ustar00rootroot00000000000000package com.iluwatar.caching; /** * * Entity class (stored in cache and DB) used in the application. * */ public class UserAccount { private String userId; private String userName; private String additionalInfo; /** * Constructor */ public UserAccount(String userId, String userName, String additionalInfo) { this.userId = userId; this.userName = userName; this.additionalInfo = additionalInfo; } public String getUserId() { return userId; } public void setUserId(String userId) { this.userId = userId; } public String getUserName() { return userName; } public void setUserName(String userName) { this.userName = userName; } public String getAdditionalInfo() { return additionalInfo; } public void setAdditionalInfo(String additionalInfo) { this.additionalInfo = additionalInfo; } @Override public String toString() { return userId + ", " + userName + ", " + additionalInfo; } } java-design-patterns-1.9.0/caching/src/test/000077500000000000000000000000001264154357600207265ustar00rootroot00000000000000java-design-patterns-1.9.0/caching/src/test/java/000077500000000000000000000000001264154357600216475ustar00rootroot00000000000000java-design-patterns-1.9.0/caching/src/test/java/com/000077500000000000000000000000001264154357600224255ustar00rootroot00000000000000java-design-patterns-1.9.0/caching/src/test/java/com/iluwatar/000077500000000000000000000000001264154357600242555ustar00rootroot00000000000000java-design-patterns-1.9.0/caching/src/test/java/com/iluwatar/caching/000077500000000000000000000000001264154357600256515ustar00rootroot00000000000000java-design-patterns-1.9.0/caching/src/test/java/com/iluwatar/caching/AppTest.java000066400000000000000000000020201264154357600300660ustar00rootroot00000000000000package com.iluwatar.caching; import org.junit.Before; import org.junit.Test; /** * * Application test * */ public class AppTest { App app; /** * Setup of application test includes: initializing DB connection and cache size/capacity. */ @Before public void setUp() { AppManager.initDb(false); // VirtualDB (instead of MongoDB) was used in running the JUnit tests // to avoid Maven compilation errors. Set flag to true to run the // tests with MongoDB (provided that MongoDB is installed and socket // connection is open). AppManager.initCacheCapacity(3); app = new App(); } @Test public void testReadAndWriteThroughStrategy() { app.useReadAndWriteThroughStrategy(); } @Test public void testReadThroughAndWriteAroundStrategy() { app.useReadThroughAndWriteAroundStrategy(); } @Test public void testReadThroughAndWriteBehindStrategy() { app.useReadThroughAndWriteBehindStrategy(); } } java-design-patterns-1.9.0/callback/000077500000000000000000000000001264154357600173205ustar00rootroot00000000000000java-design-patterns-1.9.0/callback/etc/000077500000000000000000000000001264154357600200735ustar00rootroot00000000000000java-design-patterns-1.9.0/callback/etc/callback.png000066400000000000000000000206011264154357600223340ustar00rootroot00000000000000PNG  IHDRQr!HIDATxmUŹw /MڦiR!&H[Bx@R r(T(]@H+4kԞ6//|w33Z^?ON֙=kk7okY.AuR/APT/%ϟTĝe." hKtaśg%n 60_- W<,o20 a~zT2N˟lOz~Ԏ$H/48]kXО.?p#IXagʼw[ e__L-` ϖ0_R9*t=}^i3c~-!b%}-G@5 1ڑ2;JqíEf/$ȥJ)|!5|I6O^|KbsWŤ/AqL*{FQ;q PiQ5UVrE(5IL.l 3_rbil}"M=Ԟ!9~*B8|jqWM $Mzr(),la45ϏAe"$l"ڠk [iY(m{j%m3 VoǶ3ޘzc"5Qdwyѥ-Sν3}`I^SAMYoߪGwwk_WdsG|*Cu*K;l`5xrݪ>t৽uݤyv}IE+]p"kOuF6ga[r{%Nw%L ز-vv'g>Pi]-}k_{5M_&mKXzډAi6WqUK'VD)Ha>ӔʦtwlAr /v ojC"TXf,Ejպ +yц.}vO<$,d7qKK( I Кh5(uz̥yپudFk>/μw?vky壕5'G>75dad'GV/{ft鑑{*ĉ"DG& Ҙ'/ v>}x׏χOE,5d\5J}?Fg!GOOKSR'羽1)oOPg xq5/~GNmƮR~2'Uf|$CQ^ەKxϯt;59_YxPRierY]Uѭ݌ >#7?}؋EeL$j[:ɳ:CR3< S_0Ϛߺ͢C_z>2f8r2܊c믷|kstG/`%?<,+yXOayyXe`jm`ZayyXe`jYg_@d֌Wkee0<6q)(yX<ؚf^3oBwF-hwuc~w+'dKR1!ᖺ}v"[ZR4\qy 22<.(c;#k-9L[\n>@Jrŭ.ӉLyPl%ayHn`yqqy<3)Z> =]f.~=iJi@EbɛvBYS # `^H?vdZ» '1o] ءeC=W*x e<< Ki[oƵiZbO|"=lLܫ-*2yuL{#>Į/%j]ze$˞:z#sA`bs`Uco e#?SKu8̧|'9$O_ܙf#a6yX ayyXe`jm`Zay͞9sj@Y0̣ܔ%3S5j  W<,o20|lc. sx`y[|=,g20|X-?З^vX1eE2w8(Ê10_-+yrj?VjY{~{tewF:\kn2oه"»>q5iK~l&f78̭ԝ[~o_?Gy\Ĺ+y%)yiOXq;YXaMz>C T(/3_/E Ya^_p GNAla[og)7,zaO-"aSho?zmlߵ'v7Ld<T5^vҭ73gNzߞ/"+";gc^k8+|(v-k{j&dzHUX}̚bj0|QNbk3ɉ/ utV30Oym/erf'1`5YWtRP%EN3;zR Q d/]/i>^0,E| ]d$̻&$e5ܥ-0[׊gz`1B"l7ٜD_m)WO!.C$̻&bZ ӸʼWT([tcZH]hoNu1>.;|&?9{iLsM5>aa8w S|ߝĀydb>'Nhk'[na՝?6i>~]SfÎ}`w36zC-̻&;󱟜nҼw%4ȑJ!7[m`5Y~rD.ϸ(C*tũ Y.VҞyxKe28&u.'IѝQJPV'!~&u=Zm! mLJu O~,⋒O-={3wS&3ɑd$Mf\M!{N =)/ၲ_q#_lS|&?9t{ٖ]'-s2V篨 ws6Ῥ{,3wM&31= $h,TӲOErj Q O.IM ̻&^<ʣq6L:gKW)Mq.kAqbSG.ONN|-hx~-R!%dF@o/:4)e`AٙcJwMN0ɗ}\20`>r\ ̻&Gf`5yk0y4gU6"%$.-`rPͻrJߢk:uh:T<䚆FFF-ZT<>ùs犎>?e* CNi߾}{8xW_S/\ D#/N!w[o]}bHt:ƍo{СO5!w4wܿoW\3g+#:uTTE;<䈆=<+ A"0.9rSw?xo=}u>FV8ڷ7J̛8D7ɱ5NWlOõ+.WE}Cw޻to|~ׅk'nnے;^;q|2VWPqUmN造!I$S'9'㑨 FӃN/q_z?|f&)H.30orzַg>_^\~y>[zpjދGuCħҼ73c>[>B`/LٜBP(WP+&^sͦŋmw6ӻ_q|ہ~T|ʡ%KSlr¼,2Ù/~00`?o哫W<1+E|`;S>ó: {~9bUNO@qzP9]5v}'ww Xou{ь/|/9k ̃y^(20#0z ̃y^`<%0z)_7C[S~N7OĎո`*G`C|EYXN=NW{t(1y*xi;}#Z?CízG],a){.sy kk=ތ[ҴD{.ݙxJ8 aJ%ȝ&6m`*Gf>zDq_5c9Oو:BgӁ+N09Y1}&K1j|wPegS{>>q5.3gvt;hK`rNoz7q %% Rv!q!y,.| java-design-patterns-1.9.0/callback/index.md000066400000000000000000000014621264154357600207540ustar00rootroot00000000000000--- layout: pattern title: Callback folder: callback permalink: /patterns/callback/ categories: Other tags: - Java - Difficulty-Beginner - Functional - Idiom --- **Intent:** Callback is a piece of executable code that is passed as an argument to other code, which is expected to call back (execute) the argument at some convenient time. ![alt text](./etc/callback.png "Callback") **Applicability:** Use the Callback pattern when * when some arbitrary synchronous or asynchronous action must be performed after execution of some defined activity. **Real world examples:** * [CyclicBarrier] (http://docs.oracle.com/javase/7/docs/api/java/util/concurrent/CyclicBarrier.html#CyclicBarrier%28int,%20java.lang.Runnable%29) constructor can accept callback that will be triggered every time when barrier is tripped. java-design-patterns-1.9.0/callback/pom.xml000066400000000000000000000011511264154357600206330ustar00rootroot00000000000000 4.0.0 com.iluwatar java-design-patterns 1.9.0 callback junit junit test java-design-patterns-1.9.0/callback/src/000077500000000000000000000000001264154357600201075ustar00rootroot00000000000000java-design-patterns-1.9.0/callback/src/main/000077500000000000000000000000001264154357600210335ustar00rootroot00000000000000java-design-patterns-1.9.0/callback/src/main/java/000077500000000000000000000000001264154357600217545ustar00rootroot00000000000000java-design-patterns-1.9.0/callback/src/main/java/com/000077500000000000000000000000001264154357600225325ustar00rootroot00000000000000java-design-patterns-1.9.0/callback/src/main/java/com/iluwatar/000077500000000000000000000000001264154357600243625ustar00rootroot00000000000000java-design-patterns-1.9.0/callback/src/main/java/com/iluwatar/callback/000077500000000000000000000000001264154357600261165ustar00rootroot00000000000000java-design-patterns-1.9.0/callback/src/main/java/com/iluwatar/callback/App.java000066400000000000000000000010671264154357600275050ustar00rootroot00000000000000package com.iluwatar.callback; /** * * Callback pattern is more native for functional languages where functions are treated as * first-class citizens. Prior to Java 8 callbacks can be simulated using simple (alike command) * interfaces. * */ public class App { /** * Program entry point */ public static void main(String[] args) { Task task = new SimpleTask(); Callback callback = new Callback() { @Override public void call() { System.out.println("I'm done now."); } }; task.executeWith(callback); } } java-design-patterns-1.9.0/callback/src/main/java/com/iluwatar/callback/Callback.java000066400000000000000000000001641264154357600304560ustar00rootroot00000000000000package com.iluwatar.callback; /** * * Callback interface * */ public interface Callback { void call(); } java-design-patterns-1.9.0/callback/src/main/java/com/iluwatar/callback/SimpleTask.java000066400000000000000000000004261264154357600310370ustar00rootroot00000000000000package com.iluwatar.callback; /** * * Implementation of task that need to be executed * */ public class SimpleTask extends Task { @Override public void execute() { System.out.println("Perform some important activity and after call the callback method."); } } java-design-patterns-1.9.0/callback/src/main/java/com/iluwatar/callback/Task.java000066400000000000000000000005201264154357600276600ustar00rootroot00000000000000package com.iluwatar.callback; /** * * Template-method class for callback hook execution * */ public abstract class Task { /** * Execute with callback */ public final void executeWith(Callback callback) { execute(); if (callback != null) { callback.call(); } } public abstract void execute(); } java-design-patterns-1.9.0/callback/src/test/000077500000000000000000000000001264154357600210665ustar00rootroot00000000000000java-design-patterns-1.9.0/callback/src/test/java/000077500000000000000000000000001264154357600220075ustar00rootroot00000000000000java-design-patterns-1.9.0/callback/src/test/java/com/000077500000000000000000000000001264154357600225655ustar00rootroot00000000000000java-design-patterns-1.9.0/callback/src/test/java/com/iluwatar/000077500000000000000000000000001264154357600244155ustar00rootroot00000000000000java-design-patterns-1.9.0/callback/src/test/java/com/iluwatar/callback/000077500000000000000000000000001264154357600261515ustar00rootroot00000000000000java-design-patterns-1.9.0/callback/src/test/java/com/iluwatar/callback/AppTest.java000066400000000000000000000015761264154357600304050ustar00rootroot00000000000000package com.iluwatar.callback; import org.junit.Test; import static org.junit.Assert.assertEquals; /** * Add a field as a counter. Every time the callback method is called increment this field. Unit * test checks that the field is being incremented. * * Could be done with mock objects as well where the call method call is verified. */ public class AppTest { private Integer callingCount = 0; @Test public void test() { Callback callback = new Callback() { @Override public void call() { callingCount++; } }; Task task = new SimpleTask(); assertEquals("Initial calling count of 0", new Integer(0), callingCount); task.executeWith(callback); assertEquals("Callback called once", new Integer(1), callingCount); task.executeWith(callback); assertEquals("Callback called twice", new Integer(2), callingCount); } } java-design-patterns-1.9.0/chain/000077500000000000000000000000001264154357600166465ustar00rootroot00000000000000java-design-patterns-1.9.0/chain/etc/000077500000000000000000000000001264154357600174215ustar00rootroot00000000000000java-design-patterns-1.9.0/chain/etc/chain.png000066400000000000000000000745341264154357600212260ustar00rootroot00000000000000PNG  IHDR-ey#IDATxmy.xJ A*J2qeGD|,0c-d*(jJdj#)S&- #l9_ P+ga' X, qd %9[?s=}] @e@P (=0P0v/`Chauhm p(0m1l2--&- Pe%¡DŰ:P86P@ܚi6;飵D[h N#m1l2zl7 M?"F[h N#m1l2EV'cb濧މXml_@KPp2 +^jq'~>6lO!lSJ#]x7}"y'WHr0H%ҡu [  @92,QEI?M/m]%|i ();Lȝ{iK-C)"O[ * t͕͒t/l/l^#;cA2ŵ۩!~[iK-C)/6PTNt=Oޓ4|n1NL1Hh@Pp**AGv0*KmwZ{7jHg'D!HﴶKu@KPp:- V.ðPkue:-.:ÝVS] Zau%3#ci0AhK-C)H[ * o?vl/r1E4I]4]K@-v(8EŰ:P86P@і (2@P`"b@eZF[( LD[  @hKChauhm p(0m1l2--&- Ug}anglO#iKѡꀚ*`o=xv%۾an/ 'f硬G[u)<:Ą͝?E[  X{#}ow~y>#/f V7)`/F=*݋oW {IZPUDӰ{aʠTȡ:N0X 18.E3Xib@P;ex3+_q&[[ e~k驵EfUz'^} H!?2|JV%ZP)8EW /MJM|ǁ"8J| Ӿ[ j n9ym?W%'?x]WS݌?}K㧏n3( ~G  :ʠȡ9k٫ h@nuPfm1l2anrb?|]}m0zӱ0a?v*/GI.I~20d栍M(,rdN= -mu~ZTK&3n~) yx_{_kcJPh'9RO 6q{("J 6&F!. o0ktq7GM޾WƮΟ|Bm_So[~z!/" z)T%Ub, jI3 |U9)ظ>tg~'? .?~r!RԼ)DC'C"ݷ+7~%ZP "η z  :#ZCo)o[n&5/CGد\bh@I!ќ,<#K*S\1qdtx@'.m1l2:qrrC/f{hj1lrnU#5_@ɐ N Ba%ZP£qD!ET&@2:-]{'YOo_*'m 6:TNcʕ6PWN(thKCJuF2I[  r#A:%¡4Ƕ176P@і (2@P`"b@eZF[( LD[  @hKChauhm p(0m1l2--&- P{F!ݒЪ9"cb@e`A%V֡(`ti>v~rvsO=N#>x۽Iő<)V.ȿ:{㭦4x]Ω[-@]nAɛ3mkiK-C)lr [  xǠNmATrÐ;a5m#V(]Z&XR_lgI Ru9ifb1m E;2Ű:ʀhN #ף /RRoA}p |jaR)b1nDUr>2@ v(8!R:- UQ=LiA/8BS&œ늙[) % V9- UQ9՞i/FK'ջFOïb}n ЖZ2Sr+Sb@P e {K ȥq:PP R;Vt U 8m E;2Ű:Ra؆ h|pcfZj1 1A3KCJ'ðՈ7AhK-C)lr [ * Ж (2@P`"b@eZF[( LD[  @hKChauhm p(0m1l2--&- -P tC`au @ذ &- Pe%¡DŰ:P86P@і (2@1H@(26,Qp(0m1l2-&[m6[-|xvrіjCi):I[i-> - UUy'M2v/ʠHPwk37sMw,6PU*9xU݁4ϰVPSjzN5uYj bpJiu҅cs/e_"E6N8\hauhm fcWlCR@W?lO[`t$bm1l2--~ 3ȁ6PsPz0C-aa2ЎNeh3--RҍN M@A6Ű:P86P@і  D[(6P EcA0@ DŰ:eeRS-LD[ RRRe?M]LoFR{tvHdі:2= 9sQHqV"'b o s!U- )&P3= 41KPx]]iqS:KQ@sRUFv@@~ r'se]ub5*2ެm+[ePh;e,n"<[hɔB\df9U"X`sd~z|rB"\"I=䲧 nOb{Z62Yeo`#]Cg*,oG <3u_S .hW}ýH5weĔM-1SW=dwrŖ 20 .mGL @|dq{4By"> ~ `@  }tc;?{,ػ4vjKk~T"/H6fz /Y*oP7Sf`ꀸ_-w1EA$ j)EKCn yqLKxP.V Zl4 UHx<:]sFAlH8cوmko"`R;UiOHt$c\r΀o}:J]Hiau@ZSdeKsl+}곋iK-Ρ cT6PTVȯ&*`bjg:Ev`2r +T rQ^f`1Er?"o@k `6PA`@P`"b@eZF[( LD[  @hKChauhm p(0m1l2--&- *yu|~dH)2.1F&dA[h ,es=2Ke*ɏg,a6P [k}\Pyd7:ԗxcge{&N!Yt3!cP$գ mʠ6 '"1x3u*R7RAG{]dWu5~۹׎BP!xs[k± &bADs4~|!1/w(ʧV*]BЕj1v8ûܗ,G0 7x}(30CE)qElyAt[V+[ٴ~D 8}s?btNy4 oFNg<_9.: 3'>%#@131Y85~t)gnR")|* zej5< yTT bpٺ{{ ki5L'Ĺզ~,jf)eYБd PUB\__/V_~O\fwWf=~~m]`;u[߲U4wABF Pf j30$7-J$j3pviwhfPXXX.5=>u҅cs/e_9 VHbg:K*]N-T_-Pg`xGwH;u߿?a=M]Y$g}(qK_-w1EA6A0o +tS ʹSpRy] ڊ֩P[~L'X+t'ؐ5g16 PM|/!xPuXѥ@#gH헐"qH~ N3::Zt)ePKS${2666FFF. *x 57B@ZCT W\*W5%Ak׮K(2BT xP6@IŰcǎW] B@ʠbrJѥ h *͢K@B2f5 0OBȵ )ʠbt:E+:yօbMDB2 &I(l] BUGO#*2THAZ rބt eP1LLL] BR֋o>).3>Z |j뺿38VjPK ^߹.o9DweᶟU@=q@Y_70arrriiR"Z~S_>svU9U ^CKw85տb&}#  tub4:70⨃K@hep#͹ s=vٿlLh'_^ PbA]-5v=C<#@PW&@F,,,LOO] BD+kOs8<N>WW)kQ:E_^^7A#+l͘.R*Iﵞk!tlY 3rVb/ ChWMO[XʠXXX.xV_~O\f׻1&W͸;#{:\fΐ<*&+6o!wtTKUx@BR@KFB+++EGs/{̳NE+**.>ymх4TtM ޭ3KHTb}í"_ބ`uuullR!Z\{g{v*)evA*[FWBM,ʌ<#_Ub5o*;V_.ʠ.t:EG.<ϲKl'ث<4 R;F',1]ˋ)=펿 ###EF ܾ֧Zpll+"WaZ-r׻3Be)V?TZm~D=3DQ W\*x}sZdtowІ77.O=o}1\;($WMeU\OfXmK~.mB;W j]v] <;;4 gSsտش3 ePI@ye`\^__+}iρHUH%cǎW] z20kٖdNG'dH(Jbhhʕ+EU`M ePI onn] z2-#A%1::t.=@ʠh6E @ePILLL] z2-#A%199Tt)!OeMA4b䤿+hOSI,ePIuPt)!%e)׻* *K@qSlH]*_( )r*  *K@?xO/vmܚjtlov &ۚg ?YʠX]]+ թ/e;dҺbz~k_YMZ6_u\\I7_%)0 *N3::Zt)!Z\Hsyy/)$.74{;ZY>VY)u DzWSYI>+L(JbcccddRC2ā;L>#/uPSgjY ۹ze`A2Ȭ$EW&A%qʕK@G.<ϲKl,@y+ѾcM]BH(|JRtYaBTۻv*k{n}ꮥ ^:6ؿrg^WmU? ]}VPU,qZcWlJ6N8!U{D}0fmB>%"ꏪbǎW^-TdvPĘ ʠrJѥ^eFF́WILePU onn] U~gW$`2*FGG;Nѥfe֓PUE\__/@ʠXYY)@ʠ\ZZ*p`η5`ZᨃK@_9[m0`aaazzRe6211Qt)2 P`Xѥ /lll] (/:hѥ /`0Ig&.PyW\*@flooڵRe  Lc%0'LOO/,,] (5v؁i?p@ǽP@,Pw@ǽP@(>2VI,lo=w,꥓=iuRMOx 2PcVx_=#S\ZZ"7e2 g~XlD0A|쐁M gI@lK-yPEs 0S6m5{_Yz"Fu !< wm?eeWG}7Q2e *ޖM'y8bMsx !e 똈1 []`H{vɉd[I¹l@] 䎲)d=MVt4BQDo%;իWwء?utR3.9@a(uؘr 䊂:^F 2 ?1:+efI47Xi! 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/** * * The Chain of Responsibility pattern is a design pattern consisting of command objects and a * series of processing objects. Each processing object contains logic that defines the types of * command objects that it can handle; the rest are passed to the next processing object in the * chain. A mechanism also exists for adding new processing objects to the end of this chain. *

* In this example we organize the request handlers ({@link RequestHandler}) into a chain where each * handler has a chance to act on the request on its turn. Here the king ({@link OrcKing}) makes * requests and the military orcs ({@link OrcCommander}, {@link OrcOfficer}, {@link OrcSoldier}) * form the handler chain. * */ public class App { /** * Program entry point * * @param args command line args */ public static void main(String[] args) { OrcKing king = new OrcKing(); king.makeRequest(new Request(RequestType.DEFEND_CASTLE, "defend castle")); king.makeRequest(new Request(RequestType.TORTURE_PRISONER, "torture prisoner")); king.makeRequest(new Request(RequestType.COLLECT_TAX, "collect tax")); } } java-design-patterns-1.9.0/chain/src/main/java/com/iluwatar/chain/OrcCommander.java000066400000000000000000000007501264154357600302100ustar00rootroot00000000000000package com.iluwatar.chain; /** * * OrcCommander * */ public class OrcCommander extends RequestHandler { public OrcCommander(RequestHandler handler) { super(handler); } @Override public void handleRequest(Request req) { if (req.getRequestType().equals(RequestType.DEFEND_CASTLE)) { printHandling(req); req.markHandled(); } else { super.handleRequest(req); } } @Override public String toString() { return "Orc commander"; } } java-design-patterns-1.9.0/chain/src/main/java/com/iluwatar/chain/OrcKing.java000066400000000000000000000005701264154357600271730ustar00rootroot00000000000000package com.iluwatar.chain; /** * * OrcKing makes requests that are handled by the chain. * */ public class OrcKing { RequestHandler chain; public OrcKing() { buildChain(); } private void buildChain() { chain = new OrcCommander(new OrcOfficer(new OrcSoldier(null))); } public void makeRequest(Request req) { chain.handleRequest(req); } } java-design-patterns-1.9.0/chain/src/main/java/com/iluwatar/chain/OrcOfficer.java000066400000000000000000000007441264154357600276630ustar00rootroot00000000000000package com.iluwatar.chain; /** * * OrcOfficer * */ public class OrcOfficer extends RequestHandler { public OrcOfficer(RequestHandler handler) { super(handler); } @Override public void handleRequest(Request req) { if (req.getRequestType().equals(RequestType.TORTURE_PRISONER)) { printHandling(req); req.markHandled(); } else { super.handleRequest(req); } } @Override public String toString() { return "Orc officer"; } } java-design-patterns-1.9.0/chain/src/main/java/com/iluwatar/chain/OrcSoldier.java000066400000000000000000000007361264154357600277100ustar00rootroot00000000000000package com.iluwatar.chain; /** * * OrcSoldier * */ public class OrcSoldier extends RequestHandler { public OrcSoldier(RequestHandler handler) { super(handler); } @Override public void handleRequest(Request req) { if (req.getRequestType().equals(RequestType.COLLECT_TAX)) { printHandling(req); req.markHandled(); } else { super.handleRequest(req); } } @Override public String toString() { return "Orc soldier"; } } java-design-patterns-1.9.0/chain/src/main/java/com/iluwatar/chain/Request.java000066400000000000000000000034571264154357600272760ustar00rootroot00000000000000package com.iluwatar.chain; import java.util.Objects; /** * Request */ public class Request { /** * The type of this request, used by each item in the chain to see if they should or can handle * this particular request */ private final RequestType requestType; /** * A description of the request */ private final String requestDescription; /** * Indicates if the request is handled or not. A request can only switch state from unhandled to * handled, there's no way to 'unhandle' a request */ private boolean handled = false; /** * Create a new request of the given type and accompanied description. * * @param requestType The type of request * @param requestDescription The description of the request */ public Request(final RequestType requestType, final String requestDescription) { this.requestType = Objects.requireNonNull(requestType); this.requestDescription = Objects.requireNonNull(requestDescription); } /** * Get a description of the request * * @return A human readable description of the request */ public String getRequestDescription() { return requestDescription; } /** * Get the type of this request, used by each person in the chain of command to see if they should * or can handle this particular request * * @return The request type */ public RequestType getRequestType() { return requestType; } /** * Mark the request as handled */ public void markHandled() { this.handled = true; } /** * Indicates if this request is handled or not * * @return true when the request is handled, false if not */ public boolean isHandled() { return this.handled; } @Override public String toString() { return getRequestDescription(); } } java-design-patterns-1.9.0/chain/src/main/java/com/iluwatar/chain/RequestHandler.java000066400000000000000000000010101264154357600305530ustar00rootroot00000000000000package com.iluwatar.chain; /** * * RequestHandler * */ public abstract class RequestHandler { private RequestHandler next; public RequestHandler(RequestHandler next) { this.next = next; } /** * Request handler */ public void handleRequest(Request req) { if (next != null) { next.handleRequest(req); } } protected void printHandling(Request req) { System.out.println(this + " handling request \"" + req + "\""); } @Override public abstract String toString(); } java-design-patterns-1.9.0/chain/src/main/java/com/iluwatar/chain/RequestType.java000066400000000000000000000002241264154357600301250ustar00rootroot00000000000000package com.iluwatar.chain; /** * * RequestType enumeration * */ public enum RequestType { DEFEND_CASTLE, TORTURE_PRISONER, COLLECT_TAX } java-design-patterns-1.9.0/chain/src/test/000077500000000000000000000000001264154357600204145ustar00rootroot00000000000000java-design-patterns-1.9.0/chain/src/test/java/000077500000000000000000000000001264154357600213355ustar00rootroot00000000000000java-design-patterns-1.9.0/chain/src/test/java/com/000077500000000000000000000000001264154357600221135ustar00rootroot00000000000000java-design-patterns-1.9.0/chain/src/test/java/com/iluwatar/000077500000000000000000000000001264154357600237435ustar00rootroot00000000000000java-design-patterns-1.9.0/chain/src/test/java/com/iluwatar/chain/000077500000000000000000000000001264154357600250255ustar00rootroot00000000000000java-design-patterns-1.9.0/chain/src/test/java/com/iluwatar/chain/AppTest.java000066400000000000000000000003011264154357600272420ustar00rootroot00000000000000package com.iluwatar.chain; import org.junit.Test; /** * * Application test * */ public class AppTest { @Test public void test() { String[] args = {}; App.main(args); } } java-design-patterns-1.9.0/chain/src/test/java/com/iluwatar/chain/OrcKingTest.java000066400000000000000000000016141264154357600300660ustar00rootroot00000000000000package com.iluwatar.chain; import org.junit.Test; import static org.junit.Assert.assertTrue; /** * Date: 12/6/15 - 9:29 PM * * @author Jeroen Meulemeester */ public class OrcKingTest { /** * All possible requests */ private static final Request[] REQUESTS = new Request[]{ new Request(RequestType.DEFEND_CASTLE, "Don't let the barbarians enter my castle!!"), new Request(RequestType.TORTURE_PRISONER, "Don't just stand there, tickle him!"), new Request(RequestType.COLLECT_TAX, "Don't steal, the King hates competition ..."), }; @Test public void testMakeRequest() throws Exception { final OrcKing king = new OrcKing(); for (final Request request : REQUESTS) { king.makeRequest(request); assertTrue( "Expected all requests from King to be handled, but [" + request + "] was not!", request.isHandled() ); } } }java-design-patterns-1.9.0/checkstyle-suppressions.xml000066400000000000000000000010211264154357600232110ustar00rootroot00000000000000 java-design-patterns-1.9.0/checkstyle.xml000066400000000000000000000173651264154357600204600ustar00rootroot00000000000000 java-design-patterns-1.9.0/command/000077500000000000000000000000001264154357600172025ustar00rootroot00000000000000java-design-patterns-1.9.0/command/etc/000077500000000000000000000000001264154357600177555ustar00rootroot00000000000000java-design-patterns-1.9.0/command/etc/command.png000066400000000000000000000657351264154357600221210ustar00rootroot00000000000000PNG  IHDRH3kIDATxo]$ DU :XTQLTR7PZqzNjuܜ&!1j$NGjEl!OLx7gΟ9ggvv[Wٳ;;;ٙ%A ylJP{w (Xk/΀Ͳx:Á3p+~V `í`[16LfцhW{AOVώ%ۯ:ayümw7p 6ݗwۯ: AΒrYe+4%+wvޑPH$hk;2-_uX蒨os:3gzgC}ykjӶ#mar!`U65tk Qy> guN`SBnW{|-f.#nͱ)No$i\(~; 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You can express such parameterization in a procedural language with a callback function, that is, a function that's registered somewhere to be called at a later point. Commands are an object-oriented replacement for callbacks. * specify, queue, and execute requests at different times. A Command object can have a lifetime independent of the original request. If the receiver of a request can be represented in an address space-independent way, then you can transfer a command object for the request to a different process and fulfill the request there * support undo. The Command's execute operation can store state for reversing its effects in the command itself. The Command interface must have an added Unexecute operation that reverses the effects of a previous call to execute. Executed commands are stored in a history list. Unlimited-level undo and redo is achieved by traversing this list backwards and forwards calling unexecute and execute, respectively * support logging changes so that they can be reapplied in case of a system crash. By augmenting the Command interface with load and store operations, you can keep a persistent log of changes. Recovering from a crash involves reloading logged commands from disk and re-executing them with the execute operation * structure a system around high-level operations build on primitive operations. Such a structure is common in information systems that support transactions. A transaction encapsulates a set of changes to data. The Command pattern offers a way to model transactions. Commands have a common interface, letting you invoke all transactions the same way. The pattern also makes it easy to extend the system with new transactions **Typical Use Case:** * to keep a history of requests * implement callback functionality * implement the undo functionality **Real world examples:** * [java.lang.Runnable](http://docs.oracle.com/javase/8/docs/api/java/lang/Runnable.html) **Credits** * [Design Patterns: Elements of Reusable Object-Oriented Software](http://www.amazon.com/Design-Patterns-Elements-Reusable-Object-Oriented/dp/0201633612) java-design-patterns-1.9.0/command/pom.xml000066400000000000000000000013661264154357600205250ustar00rootroot00000000000000 4.0.0 com.iluwatar java-design-patterns 1.9.0 command junit junit test org.mockito mockito-core test java-design-patterns-1.9.0/command/src/000077500000000000000000000000001264154357600177715ustar00rootroot00000000000000java-design-patterns-1.9.0/command/src/main/000077500000000000000000000000001264154357600207155ustar00rootroot00000000000000java-design-patterns-1.9.0/command/src/main/java/000077500000000000000000000000001264154357600216365ustar00rootroot00000000000000java-design-patterns-1.9.0/command/src/main/java/com/000077500000000000000000000000001264154357600224145ustar00rootroot00000000000000java-design-patterns-1.9.0/command/src/main/java/com/iluwatar/000077500000000000000000000000001264154357600242445ustar00rootroot00000000000000java-design-patterns-1.9.0/command/src/main/java/com/iluwatar/command/000077500000000000000000000000001264154357600256625ustar00rootroot00000000000000java-design-patterns-1.9.0/command/src/main/java/com/iluwatar/command/App.java000066400000000000000000000037031264154357600272500ustar00rootroot00000000000000package com.iluwatar.command; /** * * The Command pattern is a behavioral design pattern in which an object is used to encapsulate all * information needed to perform an action or trigger an event at a later time. This information * includes the method name, the object that owns the method and values for the method parameters. *

* Four terms always associated with the command pattern are command, receiver, invoker and client. * A command object (spell) knows about the receiver (target) and invokes a method of the receiver. * Values for parameters of the receiver method are stored in the command. The receiver then does * the work. An invoker object (wizard) knows how to execute a command, and optionally does * bookkeeping about the command execution. The invoker does not know anything about a concrete * command, it knows only about command interface. Both an invoker object and several command * objects are held by a client object (app). The client decides which commands to execute at which * points. To execute a command, it passes the command object to the invoker object. *

* In other words, in this example the wizard casts spells on the goblin. The wizard keeps track of * the previous spells cast, so it is easy to undo them. In addition, the wizard keeps track of the * spells undone, so they can be redone. * * */ public class App { /** * Program entry point * * @param args command line args */ public static void main(String[] args) { Wizard wizard = new Wizard(); Goblin goblin = new Goblin(); goblin.printStatus(); wizard.castSpell(new ShrinkSpell(), goblin); goblin.printStatus(); wizard.castSpell(new InvisibilitySpell(), goblin); goblin.printStatus(); wizard.undoLastSpell(); goblin.printStatus(); wizard.undoLastSpell(); goblin.printStatus(); wizard.redoLastSpell(); goblin.printStatus(); wizard.redoLastSpell(); goblin.printStatus(); } } java-design-patterns-1.9.0/command/src/main/java/com/iluwatar/command/Command.java000066400000000000000000000004421264154357600301030ustar00rootroot00000000000000package com.iluwatar.command; /** * * Interface for Commands. * */ public abstract class Command { public abstract void execute(Target target); public abstract void undo(); public abstract void redo(); @Override public abstract String toString(); } java-design-patterns-1.9.0/command/src/main/java/com/iluwatar/command/Goblin.java000066400000000000000000000004311264154357600277350ustar00rootroot00000000000000package com.iluwatar.command; /** * * Goblin is the target of the spells * */ public class Goblin extends Target { public Goblin() { setSize(Size.NORMAL); setVisibility(Visibility.VISIBLE); } @Override public String toString() { return "Goblin"; } } java-design-patterns-1.9.0/command/src/main/java/com/iluwatar/command/InvisibilitySpell.java000066400000000000000000000011511264154357600322010ustar00rootroot00000000000000package com.iluwatar.command; /** * * InvisibilitySpell is a concrete command * */ public class InvisibilitySpell extends Command { private Target target; @Override public void execute(Target target) { target.setVisibility(Visibility.INVISIBLE); this.target = target; } @Override public void undo() { if (target != null) { target.setVisibility(Visibility.VISIBLE); } } @Override public void redo() { if (target != null) { target.setVisibility(Visibility.INVISIBLE); } } @Override public String toString() { return "Invisibility spell"; } } java-design-patterns-1.9.0/command/src/main/java/com/iluwatar/command/ShrinkSpell.java000066400000000000000000000011651264154357600307660ustar00rootroot00000000000000package com.iluwatar.command; /** * * ShrinkSpell is a concrete command * */ public class ShrinkSpell extends Command { private Size oldSize; private Target target; @Override public void execute(Target target) { oldSize = target.getSize(); target.setSize(Size.SMALL); this.target = target; } @Override public void undo() { if (oldSize != null && target != null) { Size temp = target.getSize(); target.setSize(oldSize); oldSize = temp; } } @Override public void redo() { undo(); } @Override public String toString() { return "Shrink spell"; } } java-design-patterns-1.9.0/command/src/main/java/com/iluwatar/command/Size.java000066400000000000000000000005111264154357600274340ustar00rootroot00000000000000package com.iluwatar.command; /** * * Enumeration for target size. * */ public enum Size { SMALL("small"), NORMAL("normal"), LARGE("large"), UNDEFINED(""); private String title; Size(String title) { this.title = title; } @Override public String toString() { return title; } } java-design-patterns-1.9.0/command/src/main/java/com/iluwatar/command/Target.java000066400000000000000000000013341264154357600277540ustar00rootroot00000000000000package com.iluwatar.command; /** * * Base class for spell targets. * */ public abstract class Target { private Size size; private Visibility visibility; public Size getSize() { return size; } public void setSize(Size size) { this.size = size; } public Visibility getVisibility() { return visibility; } public void setVisibility(Visibility visibility) { this.visibility = visibility; } @Override public abstract String toString(); /** * Print status */ public void printStatus() { System.out.println(String.format("%s, [size=%s] [visibility=%s]", this, getSize(), getVisibility())); System.out.println(); } } java-design-patterns-1.9.0/command/src/main/java/com/iluwatar/command/Visibility.java000066400000000000000000000005261264154357600306570ustar00rootroot00000000000000package com.iluwatar.command; /** * * Enumeration for target visibility. * */ public enum Visibility { VISIBLE("visible"), INVISIBLE("invisible"), UNDEFINED(""); private String title; Visibility(String title) { this.title = title; } @Override public String toString() { return title; } } java-design-patterns-1.9.0/command/src/main/java/com/iluwatar/command/Wizard.java000066400000000000000000000022271264154357600277700ustar00rootroot00000000000000package com.iluwatar.command; import java.util.Deque; import java.util.LinkedList; /** * * Wizard is the invoker of the commands * */ public class Wizard { private Deque undoStack = new LinkedList<>(); private Deque redoStack = new LinkedList<>(); public Wizard() {} /** * Cast spell */ public void castSpell(Command command, Target target) { System.out.println(this + " casts " + command + " at " + target); command.execute(target); undoStack.offerLast(command); } /** * Undo last spell */ public void undoLastSpell() { if (!undoStack.isEmpty()) { Command previousSpell = undoStack.pollLast(); redoStack.offerLast(previousSpell); System.out.println(this + " undoes " + previousSpell); previousSpell.undo(); } } /** * Redo last spell */ public void redoLastSpell() { if (!redoStack.isEmpty()) { Command previousSpell = redoStack.pollLast(); undoStack.offerLast(previousSpell); System.out.println(this + " redoes " + previousSpell); previousSpell.redo(); } } @Override public String toString() { return "Wizard"; } } java-design-patterns-1.9.0/command/src/test/000077500000000000000000000000001264154357600207505ustar00rootroot00000000000000java-design-patterns-1.9.0/command/src/test/java/000077500000000000000000000000001264154357600216715ustar00rootroot00000000000000java-design-patterns-1.9.0/command/src/test/java/com/000077500000000000000000000000001264154357600224475ustar00rootroot00000000000000java-design-patterns-1.9.0/command/src/test/java/com/iluwatar/000077500000000000000000000000001264154357600242775ustar00rootroot00000000000000java-design-patterns-1.9.0/command/src/test/java/com/iluwatar/command/000077500000000000000000000000001264154357600257155ustar00rootroot00000000000000java-design-patterns-1.9.0/command/src/test/java/com/iluwatar/command/CommandTest.java000066400000000000000000000061101264154357600307740ustar00rootroot00000000000000package com.iluwatar.command; import static org.junit.Assert.assertEquals; import org.junit.Test; /** * The Command pattern is a behavioral design pattern in which an object is used to encapsulate all * information needed to perform an action or trigger an event at a later time. This information * includes the method name, the object that owns the method and values for the method parameters. * *

Four terms always associated with the command pattern are command, receiver, invoker and * client. A command object (spell) knows about the receiver (target) and invokes a method of * the receiver.Values for parameters of the receiver method are stored in the command. The receiver * then does the work. An invoker object (wizard) knows how to execute a command, and optionally * does bookkeeping about the command execution. The invoker does not know anything about a * concrete command, it knows only about command interface. Both an invoker object and several * command objects are held by a client object (app). The client decides which commands to execute * at which points. To execute a command, it passes the command object to the invoker object. */ public class CommandTest { private static final String GOBLIN = "Goblin"; /** * This test verifies that when the wizard casts spells on the goblin. The wizard keeps track of * the previous spells cast, so it is easy to undo them. In addition, it also verifies that the * wizard keeps track of the spells undone, so they can be redone. */ @Test public void testCommand() { Wizard wizard = new Wizard(); Goblin goblin = new Goblin(); wizard.castSpell(new ShrinkSpell(), goblin); verifyGoblin(goblin, GOBLIN, Size.SMALL, Visibility.VISIBLE); wizard.castSpell(new InvisibilitySpell(), goblin); verifyGoblin(goblin, GOBLIN, Size.SMALL, Visibility.INVISIBLE); wizard.undoLastSpell(); verifyGoblin(goblin, GOBLIN, Size.SMALL, Visibility.VISIBLE); wizard.undoLastSpell(); verifyGoblin(goblin, GOBLIN, Size.NORMAL, Visibility.VISIBLE); wizard.redoLastSpell(); verifyGoblin(goblin, GOBLIN, Size.SMALL, Visibility.VISIBLE); wizard.redoLastSpell(); verifyGoblin(goblin, GOBLIN, Size.SMALL, Visibility.INVISIBLE); } /** * This method asserts that the passed goblin object has the name as expectedName, size as * expectedSize and visibility as expectedVisibility. * * @param goblin a goblin object whose state is to be verified against other parameters * @param expectedName expectedName of the goblin * @param expectedSize expected size of the goblin * @param expectedVisibilty exepcted visibility of the goblin */ private void verifyGoblin(Goblin goblin, String expectedName, Size expectedSize, Visibility expectedVisibilty) { assertEquals("Goblin's name must be same as expectedName", expectedName, goblin.toString()); assertEquals("Goblin's size must be same as expectedSize", expectedSize, goblin.getSize()); assertEquals("Goblin's visibility must be same as expectedVisibility", expectedVisibilty, goblin.getVisibility()); } } java-design-patterns-1.9.0/composite/000077500000000000000000000000001264154357600175665ustar00rootroot00000000000000java-design-patterns-1.9.0/composite/etc/000077500000000000000000000000001264154357600203415ustar00rootroot00000000000000java-design-patterns-1.9.0/composite/etc/composite.png000066400000000000000000000375031264154357600230610ustar00rootroot00000000000000PNG  IHDRw? 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The Composite pattern describes that a * group of objects is to be treated in the same way as a single instance of an object. The intent * of a composite is to "compose" objects into tree structures to represent part-whole hierarchies. * Implementing the Composite pattern lets clients treat individual objects and compositions * uniformly. *

* In this example we have sentences composed of words composed of letters. All of the objects can * be treated through the same interface ({@link LetterComposite}). * */ public class App { /** * Program entry point * * @param args command line args */ public static void main(String[] args) { System.out.println("Message from the orcs: "); LetterComposite orcMessage = new Messenger().messageFromOrcs(); orcMessage.print(); System.out.println("\n"); System.out.println("Message from the elves: "); LetterComposite elfMessage = new Messenger().messageFromElves(); elfMessage.print(); } } java-design-patterns-1.9.0/composite/src/main/java/com/iluwatar/composite/Letter.java000066400000000000000000000004731264154357600307400ustar00rootroot00000000000000package com.iluwatar.composite; /** * * Letter * */ public class Letter extends LetterComposite { private char c; public Letter(char c) { this.c = c; } @Override protected void printThisBefore() { System.out.print(c); } @Override protected void printThisAfter() { // nop } } java-design-patterns-1.9.0/composite/src/main/java/com/iluwatar/composite/LetterComposite.java000066400000000000000000000012431264154357600326170ustar00rootroot00000000000000package com.iluwatar.composite; import java.util.ArrayList; import java.util.List; /** * * Composite interface. * */ public abstract class LetterComposite { private List children = new ArrayList(); public void add(LetterComposite letter) { children.add(letter); } public int count() { return children.size(); } protected abstract void printThisBefore(); protected abstract void printThisAfter(); /** * Print */ public void print() { printThisBefore(); for (LetterComposite letter : children) { letter.print(); } printThisAfter(); } } java-design-patterns-1.9.0/composite/src/main/java/com/iluwatar/composite/Messenger.java000066400000000000000000000037511264154357600314330ustar00rootroot00000000000000package com.iluwatar.composite; import java.util.ArrayList; import java.util.Arrays; import java.util.List; /** * * Messenger * */ public class Messenger { LetterComposite messageFromOrcs() { List words = new ArrayList(); words.add(new Word(Arrays.asList(new Letter('W'), new Letter('h'), new Letter('e'), new Letter( 'r'), new Letter('e')))); words.add(new Word(Arrays.asList(new Letter('t'), new Letter('h'), new Letter('e'), new Letter( 'r'), new Letter('e')))); words.add(new Word(Arrays.asList(new Letter('i'), new Letter('s')))); words.add(new Word(Arrays.asList(new Letter('a')))); words.add(new Word(Arrays.asList(new Letter('w'), new Letter('h'), new Letter('i'), new Letter( 'p')))); words.add(new Word(Arrays.asList(new Letter('t'), new Letter('h'), new Letter('e'), new Letter( 'r'), new Letter('e')))); words.add(new Word(Arrays.asList(new Letter('i'), new Letter('s')))); words.add(new Word(Arrays.asList(new Letter('a')))); words.add(new Word(Arrays.asList(new Letter('w'), new Letter('a'), new Letter('y')))); return new Sentence(words); } LetterComposite messageFromElves() { List words = new ArrayList(); words.add(new Word(Arrays.asList(new Letter('M'), new Letter('u'), new Letter('c'), new Letter( 'h')))); words.add(new Word(Arrays.asList(new Letter('w'), new Letter('i'), new Letter('n'), new Letter( 'd')))); words.add(new Word(Arrays.asList(new Letter('p'), new Letter('o'), new Letter('u'), new Letter( 'r'), new Letter('s')))); words.add(new Word(Arrays.asList(new Letter('f'), new Letter('r'), new Letter('o'), new Letter( 'm')))); words.add(new Word(Arrays.asList(new Letter('y'), new Letter('o'), new Letter('u'), new Letter( 'r')))); words.add(new Word(Arrays.asList(new Letter('m'), new Letter('o'), new Letter('u'), new Letter( 't'), new Letter('h')))); return new Sentence(words); } } java-design-patterns-1.9.0/composite/src/main/java/com/iluwatar/composite/Sentence.java000066400000000000000000000006231264154357600312420ustar00rootroot00000000000000package com.iluwatar.composite; import java.util.List; /** * * Sentence * */ public class Sentence extends LetterComposite { /** * Constructor */ public Sentence(List words) { for (Word w : words) { this.add(w); } } @Override protected void printThisBefore() { // nop } @Override protected void printThisAfter() { System.out.print("."); } } java-design-patterns-1.9.0/composite/src/main/java/com/iluwatar/composite/Word.java000066400000000000000000000006171264154357600304140ustar00rootroot00000000000000package com.iluwatar.composite; import java.util.List; /** * * Word * */ public class Word extends LetterComposite { /** * Constructor */ public Word(List letters) { for (Letter l : letters) { this.add(l); } } @Override protected void printThisBefore() { System.out.print(" "); } @Override protected void printThisAfter() { // nop } } java-design-patterns-1.9.0/composite/src/test/000077500000000000000000000000001264154357600213345ustar00rootroot00000000000000java-design-patterns-1.9.0/composite/src/test/java/000077500000000000000000000000001264154357600222555ustar00rootroot00000000000000java-design-patterns-1.9.0/composite/src/test/java/com/000077500000000000000000000000001264154357600230335ustar00rootroot00000000000000java-design-patterns-1.9.0/composite/src/test/java/com/iluwatar/000077500000000000000000000000001264154357600246635ustar00rootroot00000000000000java-design-patterns-1.9.0/composite/src/test/java/com/iluwatar/composite/000077500000000000000000000000001264154357600266655ustar00rootroot00000000000000java-design-patterns-1.9.0/composite/src/test/java/com/iluwatar/composite/AppTest.java000066400000000000000000000003051264154357600311060ustar00rootroot00000000000000package com.iluwatar.composite; import org.junit.Test; /** * * Application test * */ public class AppTest { @Test public void test() { String[] args = {}; App.main(args); } } java-design-patterns-1.9.0/composite/src/test/java/com/iluwatar/composite/MessengerTest.java000066400000000000000000000044371264154357600323300ustar00rootroot00000000000000package com.iluwatar.composite; import org.junit.After; import org.junit.Before; import org.junit.Test; import java.io.ByteArrayOutputStream; import java.io.PrintStream; import static org.junit.Assert.assertEquals; import static org.junit.Assert.assertNotNull; /** * Date: 12/11/15 - 8:12 PM * * @author Jeroen Meulemeester */ public class MessengerTest { /** * The buffer used to capture every write to {@link System#out} */ private ByteArrayOutputStream stdOutBuffer = new ByteArrayOutputStream(); /** * Keep the original std-out so it can be restored after the test */ private final PrintStream realStdOut = System.out; /** * Inject the mocked std-out {@link PrintStream} into the {@link System} class before each test */ @Before public void setUp() { this.stdOutBuffer = new ByteArrayOutputStream(); System.setOut(new PrintStream(stdOutBuffer)); } /** * Removed the mocked std-out {@link PrintStream} again from the {@link System} class */ @After public void tearDown() { System.setOut(realStdOut); } /** * Test the message from the orcs */ @Test public void testMessageFromOrcs() { final Messenger messenger = new Messenger(); testMessage( messenger.messageFromOrcs(), "Where there is a whip there is a way." ); } /** * Test the message from the elves */ @Test public void testMessageFromElves() { final Messenger messenger = new Messenger(); testMessage( messenger.messageFromElves(), "Much wind pours from your mouth." ); } /** * Test if the given composed message matches the expected message * * @param composedMessage The composed message, received from the messenger * @param message The expected message */ private void testMessage(final LetterComposite composedMessage, final String message) { // Test is the composed message has the correct number of words final String[] words = message.split(" "); assertNotNull(composedMessage); assertEquals(words.length, composedMessage.count()); // Print the message to the mocked stdOut ... composedMessage.print(); // ... and verify if the message matches with the expected one assertEquals(message, new String(this.stdOutBuffer.toByteArray()).trim()); } } java-design-patterns-1.9.0/dao/000077500000000000000000000000001264154357600163275ustar00rootroot00000000000000java-design-patterns-1.9.0/dao/etc/000077500000000000000000000000001264154357600171025ustar00rootroot00000000000000java-design-patterns-1.9.0/dao/etc/dao.png000066400000000000000000006446771264154357600204030ustar00rootroot00000000000000PNG  IHDRcq# iCCPICC ProfileHWXS[R -)7AzޥJ! 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By mapping application calls to the persistence layer, * DAO provide some specific data operations without exposing details of the database. This * isolation supports the Single responsibility principle. It separates what data accesses the * application needs, in terms of domain-specific objects and data types (the public interface of * the DAO), from how these needs can be satisfied with a specific DBMS. *

* With the DAO pattern, we can use various method calls to retrieve/add/delete/update data without * directly interacting with the data. The below example demonstrates basic CRUD operations: select, * add, update, and delete. * */ public class App { private static Logger log = Logger.getLogger(App.class); /** * Program entry point. * * @param args command line args. */ public static void main(final String[] args) { final CustomerDaoImpl customerDao = new CustomerDaoImpl(generateSampleCustomers()); log.info("customerDao.getAllCustomers(): " + customerDao.getAllCustomers()); log.info("customerDao.getCusterById(2): " + customerDao.getCustomerById(2)); final Customer customer = new Customer(4, "Dan", "Danson"); customerDao.addCustomer(customer); log.info("customerDao.getAllCustomers(): " + customerDao.getAllCustomers()); customer.setFirstName("Daniel"); customer.setLastName("Danielson"); customerDao.updateCustomer(customer); log.info("customerDao.getAllCustomers(): " + customerDao.getAllCustomers()); customerDao.deleteCustomer(customer); log.info("customerDao.getAllCustomers(): " + customerDao.getAllCustomers()); } /** * Generate customers. * * @return list of customers. */ public static List generateSampleCustomers() { final Customer customer1 = new Customer(1, "Adam", "Adamson"); final Customer customer2 = new Customer(2, "Bob", "Bobson"); final Customer customer3 = new Customer(3, "Carl", "Carlson"); final List customers = new ArrayList(); customers.add(customer1); customers.add(customer2); customers.add(customer3); return customers; } } java-design-patterns-1.9.0/dao/src/main/java/com/iluwatar/dao/Customer.java000066400000000000000000000025071264154357600266040ustar00rootroot00000000000000package com.iluwatar.dao; /** * * Customer * */ public class Customer { private int id; private String firstName; private String lastName; /** * Constructor */ public Customer(final int id, final String firstName, final String lastName) { this.id = id; this.firstName = firstName; this.lastName = lastName; } public int getId() { return id; } public void setId(final int id) { this.id = id; } public String getFirstName() { return firstName; } public void setFirstName(final String firstName) { this.firstName = firstName; } public String getLastName() { return lastName; } public void setLastName(final String lastName) { this.lastName = lastName; } @Override public String toString() { return "Customer{" + "id=" + getId() + ", firstName='" + getFirstName() + '\'' + ", lastName='" + getLastName() + '\'' + '}'; } @Override public boolean equals(final Object o) { boolean isEqual = false; if (this == o) { isEqual = true; } else if (o != null && getClass() == o.getClass()) { final Customer customer = (Customer) o; if (getId() == customer.getId()) { isEqual = true; } } return isEqual; } @Override public int hashCode() { int result = getId(); return result; } } java-design-patterns-1.9.0/dao/src/main/java/com/iluwatar/dao/CustomerDao.java000066400000000000000000000004721264154357600272270ustar00rootroot00000000000000package com.iluwatar.dao; import java.util.List; /** * * CustomerDao * */ public interface CustomerDao { List getAllCustomers(); Customer getCustomerById(int id); void addCustomer(Customer customer); void updateCustomer(Customer customer); void deleteCustomer(Customer customer); } java-design-patterns-1.9.0/dao/src/main/java/com/iluwatar/dao/CustomerDaoImpl.java000066400000000000000000000035101264154357600300450ustar00rootroot00000000000000package com.iluwatar.dao; import java.util.List; /** * * The data access object (DAO) is an object that provides an abstract interface to some type of * database or other persistence mechanism. By mapping application calls to the persistence layer, * DAO provide some specific data operations without exposing details of the database. This * isolation supports the Single responsibility principle. It separates what data accesses the * application needs, in terms of domain-specific objects and data types (the public interface of * the DAO), from how these needs can be satisfied with a specific DBMS, database schema, etc. * */ public class CustomerDaoImpl implements CustomerDao { // Represents the DB structure for our example so we don't have to managed it ourselves // Note: Normally this would be in the form of an actual database and not part of the Dao Impl. private List customers; public CustomerDaoImpl(final List customers) { this.customers = customers; } @Override public List getAllCustomers() { return customers; } @Override public Customer getCustomerById(final int id) { Customer customer = null; for (final Customer cus : getAllCustomers()) { if (cus.getId() == id) { customer = cus; break; } } return customer; } @Override public void addCustomer(final Customer customer) { if (getCustomerById(customer.getId()) == null) { customers.add(customer); } } @Override public void updateCustomer(final Customer customer) { if (getAllCustomers().contains(customer)) { final int index = getAllCustomers().indexOf(customer); getAllCustomers().set(index, customer); } } @Override public void deleteCustomer(final Customer customer) { getAllCustomers().remove(customer); } } java-design-patterns-1.9.0/dao/src/main/resources/000077500000000000000000000000001264154357600220545ustar00rootroot00000000000000java-design-patterns-1.9.0/dao/src/main/resources/log4j.xml000066400000000000000000000010131264154357600236100ustar00rootroot00000000000000 java-design-patterns-1.9.0/dao/src/test/000077500000000000000000000000001264154357600200755ustar00rootroot00000000000000java-design-patterns-1.9.0/dao/src/test/java/000077500000000000000000000000001264154357600210165ustar00rootroot00000000000000java-design-patterns-1.9.0/dao/src/test/java/com/000077500000000000000000000000001264154357600215745ustar00rootroot00000000000000java-design-patterns-1.9.0/dao/src/test/java/com/iluwatar/000077500000000000000000000000001264154357600234245ustar00rootroot00000000000000java-design-patterns-1.9.0/dao/src/test/java/com/iluwatar/dao/000077500000000000000000000000001264154357600241675ustar00rootroot00000000000000java-design-patterns-1.9.0/dao/src/test/java/com/iluwatar/dao/CustomerDaoImplTest.java000066400000000000000000000057771264154357600307610ustar00rootroot00000000000000package com.iluwatar.dao; import static org.junit.Assert.assertEquals; import static org.junit.Assert.assertNull; import static org.junit.Assert.assertTrue; import java.util.ArrayList; import java.util.List; import org.junit.Before; import org.junit.Test; public class CustomerDaoImplTest { private CustomerDaoImpl impl; private List customers; private static final Customer CUSTOMER = new Customer(1, "Freddy", "Krueger"); @Before public void setUp() { customers = new ArrayList(); customers.add(CUSTOMER); impl = new CustomerDaoImpl(customers); } @Test public void deleteExistingCustomer() { assertEquals(1, impl.getAllCustomers().size()); impl.deleteCustomer(CUSTOMER); assertTrue(impl.getAllCustomers().isEmpty()); } @Test public void deleteNonExistingCustomer() { final Customer nonExistingCustomer = new Customer(2, "Robert", "Englund"); impl.deleteCustomer(nonExistingCustomer); assertEquals(1, impl.getAllCustomers().size()); } @Test public void updateExistingCustomer() { final String newFirstname = "Bernard"; final String newLastname = "Montgomery"; final Customer customer = new Customer(CUSTOMER.getId(), newFirstname, newLastname); impl.updateCustomer(customer); final Customer cust = impl.getCustomerById(CUSTOMER.getId()); assertEquals(newFirstname, cust.getFirstName()); assertEquals(newLastname, cust.getLastName()); } @Test public void updateNonExistingCustomer() { final int nonExistingId = getNonExistingCustomerId(); final String newFirstname = "Douglas"; final String newLastname = "MacArthur"; final Customer customer = new Customer(nonExistingId, newFirstname, newLastname); impl.updateCustomer(customer); assertNull(impl.getCustomerById(nonExistingId)); final Customer existingCustomer = impl.getCustomerById(CUSTOMER.getId()); assertEquals(CUSTOMER.getFirstName(), existingCustomer.getFirstName()); assertEquals(CUSTOMER.getLastName(), existingCustomer.getLastName()); } @Test public void addCustomer() { final Customer newCustomer = new Customer(3, "George", "Patton"); impl.addCustomer(newCustomer); assertEquals(2, impl.getAllCustomers().size()); } @Test public void addAlreadyAddedCustomer() { final Customer newCustomer = new Customer(3, "George", "Patton"); impl.addCustomer(newCustomer); assertEquals(2, impl.getAllCustomers().size()); impl.addCustomer(newCustomer); assertEquals(2, impl.getAllCustomers().size()); } @Test public void getExistinCustomerById() { assertEquals(CUSTOMER, impl.getCustomerById(CUSTOMER.getId())); } @Test public void getNonExistinCustomerById() { final int nonExistingId = getNonExistingCustomerId(); assertNull(impl.getCustomerById(nonExistingId)); } /** * An arbitrary number which does not correspond to an active Customer id. * * @return an int of a customer id which doesn't exist */ private int getNonExistingCustomerId() { return 999; } } java-design-patterns-1.9.0/dao/src/test/java/com/iluwatar/dao/CustomerTest.java000066400000000000000000000037651264154357600275060ustar00rootroot00000000000000package com.iluwatar.dao; import static org.junit.Assert.assertEquals; import static org.junit.Assert.assertNotEquals; import org.junit.Before; import org.junit.Test; public class CustomerTest { private Customer customer; private static final int ID = 1; private static final String FIRSTNAME = "Winston"; private static final String LASTNAME = "Churchill"; @Before public void setUp() { customer = new Customer(ID, FIRSTNAME, LASTNAME); } @Test public void getAndSetId() { final int newId = 2; customer.setId(newId); assertEquals(newId, customer.getId()); } @Test public void getAndSetFirstname() { final String newFirstname = "Bill"; customer.setFirstName(newFirstname); assertEquals(newFirstname, customer.getFirstName()); } @Test public void getAndSetLastname() { final String newLastname = "Clinton"; customer.setLastName(newLastname); assertEquals(newLastname, customer.getLastName()); } @Test public void notEqualWithDifferentId() { final int newId = 2; final Customer otherCustomer = new Customer(newId, FIRSTNAME, LASTNAME); assertNotEquals(customer, otherCustomer); assertNotEquals(customer.hashCode(), otherCustomer.hashCode()); 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* In this example we show how the simple {@link Troll} first attacks and then flees the battle. * Then we decorate the {@link Troll} with a {@link SmartTroll} and perform the attack again. You * can see how the behavior changes after the decoration. * */ public class App { /** * Program entry point * * @param args command line args */ public static void main(String[] args) { // simple troll System.out.println("A simple looking troll approaches."); Hostile troll = new Troll(); troll.attack(); troll.fleeBattle(); System.out.printf("Simple troll power %d.\n", troll.getAttackPower()); // change the behavior of the simple troll by adding a decorator System.out.println("\nA smart looking troll surprises you."); Hostile smart = new SmartTroll(troll); smart.attack(); smart.fleeBattle(); System.out.printf("Smart troll power %d.\n", smart.getAttackPower()); } } java-design-patterns-1.9.0/decorator/src/main/java/com/iluwatar/decorator/Hostile.java000066400000000000000000000003051264154357600310420ustar00rootroot00000000000000package com.iluwatar.decorator; /** * * Interface for the hostile enemies. * */ public interface Hostile { void attack(); int getAttackPower(); void fleeBattle(); } java-design-patterns-1.9.0/decorator/src/main/java/com/iluwatar/decorator/SmartTroll.java000066400000000000000000000014511264154357600315410ustar00rootroot00000000000000package com.iluwatar.decorator; /** * SmartTroll is a decorator for {@link Hostile} objects. The calls to the {@link Hostile} interface * are intercepted and decorated. Finally the calls are delegated to the decorated {@link Hostile} * object. * */ public class SmartTroll implements Hostile { private Hostile decorated; public SmartTroll(Hostile decorated) { this.decorated = decorated; } @Override public void attack() { System.out.println("The troll throws a rock at you!"); decorated.attack(); } @Override public int getAttackPower() { // decorated troll power + 20 because it is smart return decorated.getAttackPower() + 20; } @Override public void fleeBattle() { System.out.println("The troll calls for help!"); decorated.fleeBattle(); } } java-design-patterns-1.9.0/decorator/src/main/java/com/iluwatar/decorator/Troll.java000066400000000000000000000006301264154357600305300ustar00rootroot00000000000000package com.iluwatar.decorator; /** * * Troll implements {@link Hostile} interface directly. * */ public class Troll implements Hostile { public void attack() { System.out.println("The troll swings at you with a club!"); } @Override public int getAttackPower() { return 10; } public void fleeBattle() { System.out.println("The troll shrieks in horror and runs away!"); } } java-design-patterns-1.9.0/decorator/src/test/000077500000000000000000000000001264154357600213145ustar00rootroot00000000000000java-design-patterns-1.9.0/decorator/src/test/java/000077500000000000000000000000001264154357600222355ustar00rootroot00000000000000java-design-patterns-1.9.0/decorator/src/test/java/com/000077500000000000000000000000001264154357600230135ustar00rootroot00000000000000java-design-patterns-1.9.0/decorator/src/test/java/com/iluwatar/000077500000000000000000000000001264154357600246435ustar00rootroot00000000000000java-design-patterns-1.9.0/decorator/src/test/java/com/iluwatar/decorator/000077500000000000000000000000001264154357600266255ustar00rootroot00000000000000java-design-patterns-1.9.0/decorator/src/test/java/com/iluwatar/decorator/AppTest.java000066400000000000000000000003051264154357600310460ustar00rootroot00000000000000package com.iluwatar.decorator; import org.junit.Test; /** * * Application test * */ public class AppTest { @Test public void test() { String[] args = {}; App.main(args); } } java-design-patterns-1.9.0/decorator/src/test/java/com/iluwatar/decorator/SmartTrollTest.java000066400000000000000000000017601264154357600324370ustar00rootroot00000000000000package com.iluwatar.decorator; import org.junit.Test; import static org.junit.Assert.assertEquals; import static org.mockito.Mockito.*; import static org.mockito.internal.verification.VerificationModeFactory.times; /** * Date: 12/7/15 - 7:47 PM * * @author Jeroen Meulemeester */ public class SmartTrollTest { @Test public void testSmartTroll() throws Exception { // Create a normal troll first, but make sure we can spy on it later on. final Hostile simpleTroll = spy(new Troll()); // Now we want to decorate the troll to make it smarter ... final Hostile smartTroll = new SmartTroll(simpleTroll); assertEquals(30, smartTroll.getAttackPower()); verify(simpleTroll, times(1)).getAttackPower(); // Check if the smart troll actions are delegated to the decorated troll smartTroll.attack(); verify(simpleTroll, times(1)).attack(); smartTroll.fleeBattle(); verify(simpleTroll, times(1)).fleeBattle(); verifyNoMoreInteractions(simpleTroll); } } java-design-patterns-1.9.0/decorator/src/test/java/com/iluwatar/decorator/TrollTest.java000066400000000000000000000031101264154357600314170ustar00rootroot00000000000000package com.iluwatar.decorator; import org.junit.After; import org.junit.Before; import org.junit.Test; import java.io.PrintStream; import static org.junit.Assert.assertEquals; import static org.mockito.Matchers.eq; import static org.mockito.Mockito.*; import static org.mockito.internal.verification.VerificationModeFactory.times; /** * Date: 12/7/15 - 7:26 PM * * @author Jeroen Meulemeester */ public class TrollTest { /** * The mocked standard out stream, required since the actions don't have any influence on other * objects, except for writing to the std-out using {@link System#out} */ private final PrintStream stdOutMock = mock(PrintStream.class); /** * Keep the original std-out so it can be restored after the test */ private final PrintStream stdOutOrig = System.out; /** * Inject the mocked std-out {@link PrintStream} into the {@link System} class before each test */ @Before public void setUp() { System.setOut(this.stdOutMock); } /** * Removed the mocked std-out {@link PrintStream} again from the {@link System} class */ @After public void tearDown() { System.setOut(this.stdOutOrig); } @Test public void testTrollActions() throws Exception { final Troll troll = new Troll(); assertEquals(10, troll.getAttackPower()); troll.attack(); verify(this.stdOutMock, times(1)).println(eq("The troll swings at you with a club!")); troll.fleeBattle(); verify(this.stdOutMock, times(1)).println(eq("The troll shrieks in horror and runs away!")); verifyNoMoreInteractions(this.stdOutMock); } }java-design-patterns-1.9.0/delegation/000077500000000000000000000000001264154357600176775ustar00rootroot00000000000000java-design-patterns-1.9.0/delegation/etc/000077500000000000000000000000001264154357600204525ustar00rootroot00000000000000java-design-patterns-1.9.0/delegation/etc/delegation.png000066400000000000000000000612541264154357600233030ustar00rootroot00000000000000PNG  IHDR@$pbsIDATxXm 5]cA%*Ƃ`C4&;5*vQED`EE[XT:+w㸣}xfgg{̼7;E``̙(Jx k߸N<ǝ. 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AǽD޽`ʏ|7Yi.,Ʃ.adrQ;ٮ]wvS%%ʊ_%н7obp!a*,`6 ڵn6^ ј1!%*)j^}93l! q`,Fٛ :#t6 P8TQ||rы_"!Yf~;٫aqkZތO*,|+qƍsq= KKGcxXVuQVVk0Q;vɷ'5jC~Z+-Bp< 2xQ&`bnW&a !lW}=8U2F ũ^GMl:8Bb5rJ8>s Q>[pի !P4C <.{t0BdnC&a("Ɓ?$z!/_ggnlhiٓ6l׷ly-P! m p: 2B!`͗A>\aﱤYGf)f>%h java-design-patterns-1.9.0/delegation/index.md000066400000000000000000000014611264154357600213320ustar00rootroot00000000000000--- layout: pattern title: Delegation folder: delegation permalink: /patterns/delegation/ categories: Behavioral tags: - Java - Difficulty-Beginner --- **Also known as:** Proxy Pattern **Intent:** It is a technique where an object expresses certain behavior to the outside but in reality delegates responsibility for implementing that behaviour to an associated object. ![alt text](./etc/delegation.png "Delegate") **Applicability:** Use the Delegate pattern in order to achieve the following * Reduce the coupling of methods to their class * Components that behave identically, but realize that this situation can change in the future. **Credits** * [Delegate Pattern: Wikipedia ](https://en.wikipedia.org/wiki/Delegation_pattern) * [Proxy Pattern: Wikipedia ](https://en.wikipedia.org/wiki/Proxy_pattern)java-design-patterns-1.9.0/delegation/pom.xml000066400000000000000000000015631264154357600212210ustar00rootroot00000000000000 java-design-patterns com.iluwatar 1.9.0 4.0.0 delegation junit junit test com.github.stefanbirkner system-rules test java-design-patterns-1.9.0/delegation/src/000077500000000000000000000000001264154357600204665ustar00rootroot00000000000000java-design-patterns-1.9.0/delegation/src/main/000077500000000000000000000000001264154357600214125ustar00rootroot00000000000000java-design-patterns-1.9.0/delegation/src/main/java/000077500000000000000000000000001264154357600223335ustar00rootroot00000000000000java-design-patterns-1.9.0/delegation/src/main/java/com/000077500000000000000000000000001264154357600231115ustar00rootroot00000000000000java-design-patterns-1.9.0/delegation/src/main/java/com/iluwatar/000077500000000000000000000000001264154357600247415ustar00rootroot00000000000000java-design-patterns-1.9.0/delegation/src/main/java/com/iluwatar/delegation/000077500000000000000000000000001264154357600270545ustar00rootroot00000000000000java-design-patterns-1.9.0/delegation/src/main/java/com/iluwatar/delegation/simple/000077500000000000000000000000001264154357600303455ustar00rootroot00000000000000java-design-patterns-1.9.0/delegation/src/main/java/com/iluwatar/delegation/simple/App.java000066400000000000000000000034141264154357600317320ustar00rootroot00000000000000package com.iluwatar.delegation.simple; import com.iluwatar.delegation.simple.printers.CanonPrinter; import com.iluwatar.delegation.simple.printers.EpsonPrinter; import com.iluwatar.delegation.simple.printers.HpPrinter; /** * The delegate pattern provides a mechanism to abstract away the implementation and control of the desired action. * The class being called in this case {@link PrinterController} is not responsible for the actual desired action, * but is actually delegated to a helper class either {@link CanonPrinter}, {@link EpsonPrinter} or {@link HpPrinter}. * The consumer does not have or require knowledge of the actual class carrying out the action, only the * container on which they are calling. * * In this example the delegates are {@link EpsonPrinter}, {@link HpPrinter} and {@link CanonPrinter} they all implement * {@link Printer}. The {@link PrinterController} class also implements {@link Printer}. However neither provide the * functionality of {@link Printer} by printing to the screen, they actually call upon the instance of {@link Printer} * that they were instantiated with. Therefore delegating the behaviour to another class. */ public class App { public static final String MESSAGE_TO_PRINT = "hello world"; /** * Program entry point * * @param args command line args */ public static void main(String[] args) { PrinterController hpPrinterController = new PrinterController(new HpPrinter()); PrinterController canonPrinterController = new PrinterController(new CanonPrinter()); PrinterController epsonPrinterController = new PrinterController(new EpsonPrinter()); hpPrinterController.print(MESSAGE_TO_PRINT); canonPrinterController.print(MESSAGE_TO_PRINT); epsonPrinterController.print(MESSAGE_TO_PRINT); } } java-design-patterns-1.9.0/delegation/src/main/java/com/iluwatar/delegation/simple/Printer.java000066400000000000000000000012641264154357600326360ustar00rootroot00000000000000package com.iluwatar.delegation.simple; import com.iluwatar.delegation.simple.printers.CanonPrinter; import com.iluwatar.delegation.simple.printers.EpsonPrinter; import com.iluwatar.delegation.simple.printers.HpPrinter; /** * Interface that both the Controller and the Delegate will implement. * * @see CanonPrinter * @see EpsonPrinter * @see HpPrinter */ public interface Printer { /** * Method that takes a String to print to the screen. This will be implemented on both the * controller and the delegate allowing the controller to call the same method on the delegate class. * * @param message to be printed to the screen */ void print(final String message); } PrinterController.java000066400000000000000000000012471264154357600346240ustar00rootroot00000000000000java-design-patterns-1.9.0/delegation/src/main/java/com/iluwatar/delegation/simplepackage com.iluwatar.delegation.simple; public class PrinterController implements Printer { private final Printer printer; public PrinterController(Printer printer) { this.printer = printer; } /** * This method is implemented from {@link Printer} however instead on providing an * implementation, it instead calls upon the class passed through the constructor. This is the delegate, * hence the pattern. Therefore meaning that the caller does not care of the implementing class only the owning * controller. * * @param message to be printed to the screen */ @Override public void print(String message) { printer.print(message); } } java-design-patterns-1.9.0/delegation/src/main/java/com/iluwatar/delegation/simple/printers/000077500000000000000000000000001264154357600322135ustar00rootroot00000000000000CanonPrinter.java000066400000000000000000000007131264154357600354020ustar00rootroot00000000000000java-design-patterns-1.9.0/delegation/src/main/java/com/iluwatar/delegation/simple/printerspackage com.iluwatar.delegation.simple.printers; import com.iluwatar.delegation.simple.Printer; /** * Specialised Implementation of {@link Printer} for a Canon Printer, in * this case the message to be printed is appended to "Canon Printer : " * * @see Printer */ public class CanonPrinter implements Printer { /** * {@inheritDoc} */ @Override public void print(String message) { System.out.print("Canon Printer : " + message); } } EpsonPrinter.java000066400000000000000000000007131264154357600354300ustar00rootroot00000000000000java-design-patterns-1.9.0/delegation/src/main/java/com/iluwatar/delegation/simple/printerspackage com.iluwatar.delegation.simple.printers; import com.iluwatar.delegation.simple.Printer; /** * Specialised Implementation of {@link Printer} for a Epson Printer, in * this case the message to be printed is appended to "Epson Printer : " * * @see Printer */ public class EpsonPrinter implements Printer { /** * {@inheritDoc} */ @Override public void print(String message) { System.out.print("Epson Printer : " + message); } } HpPrinter.java000066400000000000000000000006771264154357600347240ustar00rootroot00000000000000java-design-patterns-1.9.0/delegation/src/main/java/com/iluwatar/delegation/simple/printerspackage com.iluwatar.delegation.simple.printers; import com.iluwatar.delegation.simple.Printer; /** * Specialised Implementation of {@link Printer} for a HP Printer, in * this case the message to be printed is appended to "HP Printer : " * * @see Printer */ public class HpPrinter implements Printer { /** * {@inheritDoc} */ @Override public void print(String message) { System.out.print("HP Printer : " + message); } } java-design-patterns-1.9.0/delegation/src/test/000077500000000000000000000000001264154357600214455ustar00rootroot00000000000000java-design-patterns-1.9.0/delegation/src/test/java/000077500000000000000000000000001264154357600223665ustar00rootroot00000000000000java-design-patterns-1.9.0/delegation/src/test/java/com/000077500000000000000000000000001264154357600231445ustar00rootroot00000000000000java-design-patterns-1.9.0/delegation/src/test/java/com/iluwatar/000077500000000000000000000000001264154357600247745ustar00rootroot00000000000000java-design-patterns-1.9.0/delegation/src/test/java/com/iluwatar/delegation/000077500000000000000000000000001264154357600271075ustar00rootroot00000000000000java-design-patterns-1.9.0/delegation/src/test/java/com/iluwatar/delegation/simple/000077500000000000000000000000001264154357600304005ustar00rootroot00000000000000java-design-patterns-1.9.0/delegation/src/test/java/com/iluwatar/delegation/simple/AppTest.java000066400000000000000000000002531264154357600326230ustar00rootroot00000000000000package com.iluwatar.delegation.simple; import org.junit.Test; public class AppTest { @Test public void test() { String[] args = {}; App.main(args); } } java-design-patterns-1.9.0/delegation/src/test/java/com/iluwatar/delegation/simple/DelegateTest.java000066400000000000000000000025161264154357600336210ustar00rootroot00000000000000package com.iluwatar.delegation.simple; import com.iluwatar.delegation.simple.printers.CanonPrinter; import com.iluwatar.delegation.simple.printers.EpsonPrinter; import com.iluwatar.delegation.simple.printers.HpPrinter; import org.junit.Rule; import org.junit.Test; import org.junit.contrib.java.lang.system.SystemOutRule; import static org.junit.Assert.assertEquals; public class DelegateTest { private static final String MESSAGE = "Test Message Printed"; @Rule public final SystemOutRule systemOutRule = new SystemOutRule().enableLog(); @Test public void testCanonPrinter() throws Exception { PrinterController printerController = new PrinterController(new CanonPrinter()); printerController.print(MESSAGE); assertEquals("Canon Printer : Test Message Printed", systemOutRule.getLog()); } @Test public void testHpPrinter() throws Exception { PrinterController printerController = new PrinterController(new HpPrinter()); printerController.print(MESSAGE); assertEquals("HP Printer : Test Message Printed", systemOutRule.getLog()); } @Test public void testEpsonPrinter() throws Exception { PrinterController printerController = new PrinterController(new EpsonPrinter()); printerController.print(MESSAGE); assertEquals("Epson Printer : Test Message Printed", systemOutRule.getLog()); } } java-design-patterns-1.9.0/dependency-injection/000077500000000000000000000000001264154357600216625ustar00rootroot00000000000000java-design-patterns-1.9.0/dependency-injection/etc/000077500000000000000000000000001264154357600224355ustar00rootroot00000000000000java-design-patterns-1.9.0/dependency-injection/etc/dependency-injection.png000066400000000000000000000537351264154357600272560ustar00rootroot00000000000000PNG  IHDRnZWIDATx}l%}JO&/@ЪLozFGK]$*  P 5 R/ъKM$_P+BNRQ"Nbf $*E05QM,azD)f6_@BNRSD| 9J'vkW>]tK<)W* 䔎[ɄP)Z׻mWvjR 7;PEz+1=`wz rXwsuM&I f7 9%zSM0=0ˬg0L`@%XCD/V́+tj/#V4)%g >F{7)Bqǹ\UqUfiZf\9m6m"ݸEV:;L$ UPEf+'MI,H 2=:=NcvwMzqwV ^'HIz㛍PE>UdrJ$&jkzvӻ:9nmB]6V3J# BA|ȡ4VNЛzSY"ѧ'~kl,:cݞ<6I:PpٕӃz}⛍PTI }zP[2:j\Nբh7}Zw%B nF"6CNЛ*zSY"4N)=8vw, 4qιcC v"y1)E*j%))B݃ID)f6_@BNRSD| 9JLMbf $*E05QM,azD)f6_@BNRSD| 9JLMbf $*E-M˯l^zb}Lkj͡$av|s *2CO4wub&-_r Zp)Q69go)gL{訴\JtZRLZ lZpeveڗsV~IUoNG`$7]0+4CNiUd܊ Z.Z *S3C {=]x<^#=yYP_UܕjEcӓF'{*6=Ι0Ng30=ٙRBCf\aRV i2Jl-LʬQ"M˯l䉻Nwyr|Q`z:1Laz D`?i bgY*;:;O“bYN|s2<=Ǜ}y-ʊ!?uSGPlY%LLϵGV7b6p_}zn{}K\m̄f> ʬݭK΅L`ع?!tb> <::XzI8O*vsݎzRC}Dkdܘ,fo^f(c,)DdJyf̛(I!?uSi]π]_m9ڥ׃(S=_SOl(8e(HgҾ=ncߜȣ9~mKmpDlmrc5Z;,v ߤ=p+[^M+$_#G' <>JfW(Ҏc$:Q&]⛓~(ID7Q{_q1hc SBƟ 7l2dE~I e42=bS{N^{;w .Yxߥ^vKޟ\T9޵n$툊2sOUI1lGNNczE5$"ON,Gc#Rr4pC85[q Q.9NIHtk%]N pՈ>v0a)JD[%9ʬQ"wX?_~U-N}[OOv?ޥI F+ίĩ-4ݗVzC[Jj)ŲK"!1Rl58b/Pჽ C:giSrt'J 2lJp1&F3e(HÏuّ}[8?G>7r-~gGP5Wa[O*LO@58IX ]E=m 5=)!^RfŐ)ڰW۫5KɑbşYʬQ"Ľu᝗}`OXy_<&O7qr0ډ[ .a= Onb_o'c^5&$b3->m"Ol-3`&g4Srɴ༽w~-Đ)"=ڎmmyhwşYʬQ"čӳы޳~滟:|ߩ/-Kｒ>NCy1>\!;˭̞ kH̲}9;.T*RJ"_Fӓ SLuBe8#I:2xpt/ 9(9ɫSWZ$]m{XI #(e2=.>刺LkĎ'$_YC_wk~e]F ҿ]}=xoD("$R5oIs=VX^w8IBoN.1Gd^bO3$"n]^)*s2/LRfAjekR*X!R2 T09F#' jizziL)0=f,azD)fr"L(& H T0=`j3/X !'P)􀩉Rl"`@&J1r"L(& H T0=`j3/X !'P)hެŽ\t0(oa4H 9UGM0=h͡3;o_ 9-0=b[yLoICE^6+gy03i`{\g`u{Α“?ִ:3C͎/TDj7X E0wCJD`G_YJsBC+I Jo!uJԧ8I f2BNЛlyelmO%N +9@n'ÞUM(z Ux!'Ma68VBOEkΑYPUϭlT٢) 2BNЛlh[tڞv춽O5O5=:ބB5^F zS6=.] Tjj@uaD6F4j}W M)}zz Ux!'M]6|b-)KasboY]m8 /TQ_9AoMeA`8=FD| 9JLMbf $*E05QM,azD)f6_@BNRSD| 9JLMbf $*EM[Zz%H @P E@Mlh"`@X EQ(& H T0=`j3/X !'P)􀩉Rl"`@A745f (tdSG7rbGu3/X !'P)􀩉Rl"`@h_7Os/Ԥ$_~BNR45X~-~Yͦ$*rQIW`jTA/X/!'P)jzڜWƺwۭNkT/~Y)"m kw[v5MRlnuzI~aDMёmRIw{O9`sΔ@]/Ks\O%)B[ɑC"Ǥם 65*Bd.> ܶwBSJ_тTU'ΧM.]@cS%B"*(HdMG߼:1Τk?sQ\g=lIZ*[%I"rzOS`K2 Mm|y{ESUcDVN5RH)럸η_2ӁkC)A#'w{ `I=C1gҙ[K߆~&+\w$U;ճuT 2d rDfы?XhvjUTMuRw]+o=w FV:*obu*'zj cunGp8dU EH6=sWe,Ť%t`Oz`.w8eb.>SbzF99dx $IE:7+ȊGSM.] Sy5;Cb' $TA#HMϛizӇӿR 8p]-E*w%@JON&zP^}f~pICK`nX,)\ٍ&R Dr]##M7t' pWQ3h RAlz7>>s;-A_Z٘:}B`S: _ 0ӓBay.i:\ `{TH+I+|d7oI5Yh*TեBoz2Hb9Դ G"$'G]8rjS p4lxl"kz5=sO5=SA bR>D-i5=1A G&E lu/E&FV1 obu*'ՎquB{l3hOTAj"H:2{އnZyȡgiokd4aUsVxt0m ?غOƦ鑓ۜ^p')n{;`gFjR o-\da]ȊGSM.Mky(oM`gў&AN~~ס9ڙܯlws9{}J+szvw}QV~~~vIYIJ5=!$\H5!L8~!֤@ތT] ǟLk7T|KO9 Cl(:/JaCM{BzR̲^ 0NO%p*M^'Yeް(Sل LOI\nԈ̥Q3ӓ!͎\BN,0=eџ)G5O饘v'uܛ_թ賵X]ل Gu3/X !'P)􀩉Rl"`@&J1r"L(& H T0=`j3/X !'P)ɌbW+y;5q?e&?FR,;\z5;r"Le룰Qs*?sb/,45kv|+&9)EMK#k8>r5=wlǕ~vF|͎oń '؝(=if͐ҙKe0,Tb' 6YSaf̚<}nS4=W|?_=QZ9yW)4L׋2enY4Lߧ[NkVL rR5 R)ܱw_s&4x&svfncMo|5Ȓ3 g5L4"I]6q_Z35QnkVL rRZS_cc_f܊lؖ|򼎷ء$9nq̚@GS̹8{ڇ^8ta/ nƔ>U^y/4 F|͎oń 'ys|?n\uUtڪt¤(0=@ XZZ QYqo6 '&&>\T$a\I 4P`zA];HAIRSrilM싋u.`zAϔL\Y4re1Iwsss||HG`~~b}}]Bl Yvc@OÆj@n}azzOA/߽{IW݃hhT SBN,--ҴѼ}Ȉj=#i 貓Am+:',ʅHz4jHI(0=@ugTÝzܬ,='Nn)jL>]c|ǁLP8`zА>#D#L.o[UWLPjTƆw_;w_+$!Se%TS,ʊ yبG3gU51jrxLP:0WcdgQ:iy9pА{:xJG3eR 9\Zu{e6nݴ `zrah2P4rn镲z4S۪̬_5SGu*LP.\<!,(OW]nOӣyp&Ù6۹}M |MVVV^T3gΌ6Vb@.V|^ނVl(rHq#tMv;HzMf(MPCy^״FN'ɞW?xP[=8c9VWW)F#{N'9QxE\ֺ~M( MtBT:>>6>;j8p΂C\VfMu2uI+L<ϛ[knu۽v[P$6s?gak40=@Yh(iLLL,..p`6E% jmWvvg3~<Ը&ɕ=W&&pRC0=0=@)hȤiM|r $Vc"+JѼ־UX=&x5䯛]\I'Ih&`zAmttㆅ@w+k5"ɼZݷ.Ғe *B2D<YCY|Mf(0 |kqqIé:8XڐEn%5v=??/,벙UI,zZ?e_5`4p Z4ɤ|Sݮgo*y}wΜ9f$ze=eHj]H6W[קk40=@hh2$4Јc :^z)=s6ۨi17lv޽ P `z"I'AEy~m{Ś~vy8w"]~u;«4#7l2:䄴.766 ZI Ĵr͍C/> @½77tk,RFKNL;;Ｓ޳gϞ@@ &ق^=|jj_MOvWt|0=@1h*xX޽[)E)ke$YM2Hy+FBjKLP *{ʁ?Bpl ESdȒ1y1Pr,臷m}}?`z{@?B]<@~ddD)ay{E;h&4#z#sK3&}*k*MOy&ԣY&NyD՜Fŵ*?89!#;?NNNb6@%3uN@5asssdd$:0O|;jzp7 .ܐ&%e$g3L t"3JPqc2jllEQ n|$= ێhִ/-=j= /*LTT#yR]HY._rBIzhh(oX۷ף!][J^s?P `zhHsv:D&=/)þekxW^/搿'G=PTI'ۻyxxXʉUk&u C"';R^u&[Cz衇`I{Ɔ=#]vdF#,vo~z:33s62ɻfʇj:V<|mZ϶ h P _ ^x_\/ }"yAͮf\}]ۿo~+>t گ La1:[-dE.5gw_Q6d$=PJ"? 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The pattern separates the creation of a client's dependencies from its own behavior, which allows program designs to be loosely coupled and to follow the inversion of control and single responsibility principles. ![alt text](./etc/dependency-injection.png "Dependency Injection") **Applicability:** Use the Dependency Injection pattern when * when you need to remove knowledge of concrete implementation from object * to enable unit testing of classes in isolation using mock objects or stubs java-design-patterns-1.9.0/dependency-injection/pom.xml000066400000000000000000000016101264154357600231750ustar00rootroot00000000000000 4.0.0 com.iluwatar java-design-patterns 1.9.0 dependency-injection junit junit test org.mockito mockito-core test com.google.inject guice 4.0 java-design-patterns-1.9.0/dependency-injection/src/000077500000000000000000000000001264154357600224515ustar00rootroot00000000000000java-design-patterns-1.9.0/dependency-injection/src/main/000077500000000000000000000000001264154357600233755ustar00rootroot00000000000000java-design-patterns-1.9.0/dependency-injection/src/main/java/000077500000000000000000000000001264154357600243165ustar00rootroot00000000000000java-design-patterns-1.9.0/dependency-injection/src/main/java/com/000077500000000000000000000000001264154357600250745ustar00rootroot00000000000000java-design-patterns-1.9.0/dependency-injection/src/main/java/com/iluwatar/000077500000000000000000000000001264154357600267245ustar00rootroot00000000000000java-design-patterns-1.9.0/dependency-injection/src/main/java/com/iluwatar/dependency/000077500000000000000000000000001264154357600310425ustar00rootroot00000000000000java-design-patterns-1.9.0/dependency-injection/src/main/java/com/iluwatar/dependency/injection/000077500000000000000000000000001264154357600330245ustar00rootroot00000000000000AdvancedWizard.java000066400000000000000000000006251264154357600365010ustar00rootroot00000000000000java-design-patterns-1.9.0/dependency-injection/src/main/java/com/iluwatar/dependency/injectionpackage com.iluwatar.dependency.injection; /** * * AdvancedWizard implements inversion of control. It depends on abstraction that can be injected * through its constructor. * */ public class AdvancedWizard implements Wizard { private Tobacco tobacco; public AdvancedWizard(Tobacco tobacco) { this.tobacco = tobacco; } @Override public void smoke() { tobacco.smoke(this); } } App.java000066400000000000000000000036041264154357600343330ustar00rootroot00000000000000java-design-patterns-1.9.0/dependency-injection/src/main/java/com/iluwatar/dependency/injectionpackage com.iluwatar.dependency.injection; import com.google.inject.Guice; import com.google.inject.Injector; /** * * Dependency Injection pattern deals with how objects handle their dependencies. The pattern * implements so called inversion of control principle. Inversion of control has two specific rules: * - High-level modules should not depend on low-level modules. Both should depend on abstractions. * - Abstractions should not depend on details. Details should depend on abstractions. *

* In this example we show you three different wizards. The first one ({@link SimpleWizard}) is a * naive implementation violating the inversion of control principle. It depends directly on a * concrete implementation which cannot be changed. *

* The second wizard ({@link AdvancedWizard}) is more flexible. It does not depend on any concrete * implementation but abstraction. It utilizes Dependency Injection pattern allowing its * {@link Tobacco} dependency to be injected through its constructor. This way, handling the * dependency is no longer the wizard's responsibility. It is resolved outside the wizard class. *

* The third example takes the pattern a step further. It uses Guice framework for Dependency * Injection. {@link TobaccoModule} binds a concrete implementation to abstraction. Injector is then * used to create {@link GuiceWizard} object with correct dependencies. * */ public class App { /** * Program entry point * * @param args command line args */ public static void main(String[] args) { SimpleWizard simpleWizard = new SimpleWizard(); simpleWizard.smoke(); AdvancedWizard advancedWizard = new AdvancedWizard(new SecondBreakfastTobacco()); advancedWizard.smoke(); Injector injector = Guice.createInjector(new TobaccoModule()); GuiceWizard guiceWizard = injector.getInstance(GuiceWizard.class); guiceWizard.smoke(); } } GuiceWizard.java000066400000000000000000000006651264154357600360340ustar00rootroot00000000000000java-design-patterns-1.9.0/dependency-injection/src/main/java/com/iluwatar/dependency/injectionpackage com.iluwatar.dependency.injection; import javax.inject.Inject; /** * * GuiceWizard implements inversion of control. Its dependencies are injected through its * constructor by Guice framework. * */ public class GuiceWizard implements Wizard { private Tobacco tobacco; @Inject public GuiceWizard(Tobacco tobacco) { this.tobacco = tobacco; } @Override public void smoke() { tobacco.smoke(this); } } OldTobyTobacco.java000066400000000000000000000002451264154357600364600ustar00rootroot00000000000000java-design-patterns-1.9.0/dependency-injection/src/main/java/com/iluwatar/dependency/injectionpackage com.iluwatar.dependency.injection; /** * * OldTobyTobacco concrete {@link Tobacco} implementation * */ public class OldTobyTobacco extends Tobacco { } RivendellTobacco.java000066400000000000000000000002511264154357600370250ustar00rootroot00000000000000java-design-patterns-1.9.0/dependency-injection/src/main/java/com/iluwatar/dependency/injectionpackage com.iluwatar.dependency.injection; /** * * RivendellTobacco concrete {@link Tobacco} implementation * */ public class RivendellTobacco extends Tobacco { } SecondBreakfastTobacco.java000066400000000000000000000002651264154357600401440ustar00rootroot00000000000000java-design-patterns-1.9.0/dependency-injection/src/main/java/com/iluwatar/dependency/injectionpackage com.iluwatar.dependency.injection; /** * * SecondBreakfastTobacco concrete {@link Tobacco} implementation * */ public class SecondBreakfastTobacco extends Tobacco { } SimpleWizard.java000066400000000000000000000005241264154357600362230ustar00rootroot00000000000000java-design-patterns-1.9.0/dependency-injection/src/main/java/com/iluwatar/dependency/injectionpackage com.iluwatar.dependency.injection; /** * * Naive Wizard implementation violating the inversion of control principle. It should depend on * abstraction instead. * */ public class SimpleWizard implements Wizard { private OldTobyTobacco tobacco = new OldTobyTobacco(); public void smoke() { tobacco.smoke(this); } } Tobacco.java000066400000000000000000000004431264154357600351630ustar00rootroot00000000000000java-design-patterns-1.9.0/dependency-injection/src/main/java/com/iluwatar/dependency/injectionpackage com.iluwatar.dependency.injection; /** * * Tobacco abstraction * */ public abstract class Tobacco { public void smoke(Wizard wizard) { System.out.println(String.format("%s smoking %s", wizard.getClass().getSimpleName(), this .getClass().getSimpleName())); } } TobaccoModule.java000066400000000000000000000005141264154357600363300ustar00rootroot00000000000000java-design-patterns-1.9.0/dependency-injection/src/main/java/com/iluwatar/dependency/injectionpackage com.iluwatar.dependency.injection; import com.google.inject.AbstractModule; /** * * Guice module for binding certain concrete {@link Tobacco} implementation. * */ public class TobaccoModule extends AbstractModule { @Override protected void configure() { bind(Tobacco.class).to(RivendellTobacco.class); } } Wizard.java000066400000000000000000000001751264154357600350530ustar00rootroot00000000000000java-design-patterns-1.9.0/dependency-injection/src/main/java/com/iluwatar/dependency/injectionpackage com.iluwatar.dependency.injection; /** * * Wizard interface * */ public interface Wizard { void smoke(); } java-design-patterns-1.9.0/dependency-injection/src/test/000077500000000000000000000000001264154357600234305ustar00rootroot00000000000000java-design-patterns-1.9.0/dependency-injection/src/test/java/000077500000000000000000000000001264154357600243515ustar00rootroot00000000000000java-design-patterns-1.9.0/dependency-injection/src/test/java/com/000077500000000000000000000000001264154357600251275ustar00rootroot00000000000000java-design-patterns-1.9.0/dependency-injection/src/test/java/com/iluwatar/000077500000000000000000000000001264154357600267575ustar00rootroot00000000000000java-design-patterns-1.9.0/dependency-injection/src/test/java/com/iluwatar/dependency/000077500000000000000000000000001264154357600310755ustar00rootroot00000000000000java-design-patterns-1.9.0/dependency-injection/src/test/java/com/iluwatar/dependency/injection/000077500000000000000000000000001264154357600330575ustar00rootroot00000000000000AdvancedWizardTest.java000066400000000000000000000021261264154357600373720ustar00rootroot00000000000000java-design-patterns-1.9.0/dependency-injection/src/test/java/com/iluwatar/dependency/injectionpackage com.iluwatar.dependency.injection; import org.junit.Test; import static org.mockito.Mockito.times; import static org.mockito.Mockito.verify; import static org.mockito.Mockito.verifyNoMoreInteractions; /** * Date: 12/10/15 - 8:40 PM * * @author Jeroen Meulemeester */ public class AdvancedWizardTest extends StdOutTest { /** * Test if the {@link AdvancedWizard} smokes whatever instance of {@link Tobacco} is passed to him * through the constructor parameter */ @Test public void testSmokeEveryThing() throws Exception { final Tobacco[] tobaccos = { new OldTobyTobacco(), new RivendellTobacco(), new SecondBreakfastTobacco() }; for (final Tobacco tobacco : tobaccos) { final AdvancedWizard advancedWizard = new AdvancedWizard(tobacco); advancedWizard.smoke(); // Verify if the wizard is smoking the correct tobacco ... verify(getStdOutMock(), times(1)).println("AdvancedWizard smoking " + tobacco.getClass().getSimpleName()); // ... and nothing else is happening. verifyNoMoreInteractions(getStdOutMock()); } } }AppTest.java000066400000000000000000000003201264154357600352160ustar00rootroot00000000000000java-design-patterns-1.9.0/dependency-injection/src/test/java/com/iluwatar/dependency/injectionpackage com.iluwatar.dependency.injection; import org.junit.Test; /** * * Application test * */ public class AppTest { @Test public void test() { String[] args = {}; App.main(args); } } GuiceWizardTest.java000066400000000000000000000045451264154357600367300ustar00rootroot00000000000000java-design-patterns-1.9.0/dependency-injection/src/test/java/com/iluwatar/dependency/injectionpackage com.iluwatar.dependency.injection; import com.google.inject.AbstractModule; import com.google.inject.Guice; import com.google.inject.Injector; import org.junit.Test; import static org.mockito.Mockito.times; import static org.mockito.Mockito.verify; import static org.mockito.Mockito.verifyNoMoreInteractions; /** * Date: 12/10/15 - 8:57 PM * * @author Jeroen Meulemeester */ public class GuiceWizardTest extends StdOutTest { /** * Test if the {@link GuiceWizard} smokes whatever instance of {@link Tobacco} is passed to him * through the constructor parameter */ @Test public void testSmokeEveryThingThroughConstructor() throws Exception { final Tobacco[] tobaccos = { new OldTobyTobacco(), new RivendellTobacco(), new SecondBreakfastTobacco() }; for (final Tobacco tobacco : tobaccos) { final GuiceWizard guiceWizard = new GuiceWizard(tobacco); guiceWizard.smoke(); // Verify if the wizard is smoking the correct tobacco ... verify(getStdOutMock(), times(1)).println("GuiceWizard smoking " + tobacco.getClass().getSimpleName()); // ... and nothing else is happening. verifyNoMoreInteractions(getStdOutMock()); } } /** * Test if the {@link GuiceWizard} smokes whatever instance of {@link Tobacco} is passed to him * through the Guice google inject framework */ @Test public void testSmokeEveryThingThroughInjectionFramework() throws Exception { @SuppressWarnings("unchecked") final Class[] tobaccos = new Class[]{ OldTobyTobacco.class, RivendellTobacco.class, SecondBreakfastTobacco.class }; for (final Class tobaccoClass : tobaccos) { // Configure the tobacco in the injection framework ... final Injector injector = Guice.createInjector(new AbstractModule() { @Override protected void configure() { bind(Tobacco.class).to(tobaccoClass); } }); // ... and create a new wizard with it final GuiceWizard guiceWizard = injector.getInstance(GuiceWizard.class); guiceWizard.smoke(); // Verify if the wizard is smoking the correct tobacco ... verify(getStdOutMock(), times(1)).println("GuiceWizard smoking " + tobaccoClass.getSimpleName()); // ... and nothing else is happening. verifyNoMoreInteractions(getStdOutMock()); } } }SimpleWizardTest.java000066400000000000000000000011371264154357600371170ustar00rootroot00000000000000java-design-patterns-1.9.0/dependency-injection/src/test/java/com/iluwatar/dependency/injectionpackage com.iluwatar.dependency.injection; import org.junit.Test; import static org.mockito.Mockito.*; /** * Date: 12/10/15 - 8:26 PM * * @author Jeroen Meulemeester */ public class SimpleWizardTest extends StdOutTest { /** * Test if the {@link SimpleWizard} does the only thing it can do: Smoke it's {@link * OldTobyTobacco} */ @Test public void testSmoke() { final SimpleWizard simpleWizard = new SimpleWizard(); simpleWizard.smoke(); verify(getStdOutMock(), times(1)).println("SimpleWizard smoking OldTobyTobacco"); verifyNoMoreInteractions(getStdOutMock()); } }StdOutTest.java000066400000000000000000000023571264154357600357340ustar00rootroot00000000000000java-design-patterns-1.9.0/dependency-injection/src/test/java/com/iluwatar/dependency/injectionpackage com.iluwatar.dependency.injection; import org.junit.After; import org.junit.Before; import java.io.PrintStream; import static org.mockito.Mockito.mock; /** * Date: 12/10/15 - 8:37 PM * * @author Jeroen Meulemeester */ public abstract class StdOutTest { /** * The mocked standard out {@link PrintStream}, required since the actions of the wizard don't * have any influence on any other accessible objects, except for writing to std-out using {@link * System#out} */ private final PrintStream stdOutMock = mock(PrintStream.class); /** * Keep the original std-out so it can be restored after the test */ private final PrintStream stdOutOrig = System.out; /** * Inject the mocked std-out {@link PrintStream} into the {@link System} class before each test */ @Before public void setUp() { System.setOut(this.stdOutMock); 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Only if the locking criterion check indicates that locking is required does the actual locking logic proceed. ![alt text](./etc/double_checked_locking_1.png "Double Checked Locking") **Applicability:** Use the Double Checked Locking pattern when * there is a concurrent access in object creation, e.g. singleton, where you want to create single instance of the same class and checking if it's null or not maybe not be enough when there are two or more threads that checks if instance is null or not. * there is a concurrent access on a method where method's behaviour changes according to the some constraints and these constraint change within this method. java-design-patterns-1.9.0/double-checked-locking/pom.xml000066400000000000000000000013531264154357600233650ustar00rootroot00000000000000 4.0.0 com.iluwatar java-design-patterns 1.9.0 double-checked-locking junit junit test org.mockito mockito-core test java-design-patterns-1.9.0/double-checked-locking/src/000077500000000000000000000000001264154357600226355ustar00rootroot00000000000000java-design-patterns-1.9.0/double-checked-locking/src/main/000077500000000000000000000000001264154357600235615ustar00rootroot00000000000000java-design-patterns-1.9.0/double-checked-locking/src/main/java/000077500000000000000000000000001264154357600245025ustar00rootroot00000000000000java-design-patterns-1.9.0/double-checked-locking/src/main/java/com/000077500000000000000000000000001264154357600252605ustar00rootroot00000000000000java-design-patterns-1.9.0/double-checked-locking/src/main/java/com/iluwatar/000077500000000000000000000000001264154357600271105ustar00rootroot00000000000000java-design-patterns-1.9.0/double-checked-locking/src/main/java/com/iluwatar/doublechecked/000077500000000000000000000000001264154357600316715ustar00rootroot00000000000000java-design-patterns-1.9.0/double-checked-locking/src/main/java/com/iluwatar/doublechecked/locking/000077500000000000000000000000001264154357600333175ustar00rootroot00000000000000App.java000066400000000000000000000026271264154357600346320ustar00rootroot00000000000000java-design-patterns-1.9.0/double-checked-locking/src/main/java/com/iluwatar/doublechecked/lockingpackage com.iluwatar.doublechecked.locking; import java.util.concurrent.ExecutorService; import java.util.concurrent.Executors; import java.util.concurrent.TimeUnit; /** * * Double Checked Locking is a concurrency design pattern used to reduce the overhead of acquiring a * lock by first testing the locking criterion (the "lock hint") without actually acquiring the * lock. Only if the locking criterion check indicates that locking is required does the actual * locking logic proceed. *

* In {@link Inventory} we store the items with a given size. However, we do not store more items * than the inventory size. To address concurrent access problems we use double checked locking to * add item to inventory. In this method, the thread which gets the lock first adds the item. * */ public class App { /** * Program entry point * * @param args command line args */ public static void main(String[] args) { final Inventory inventory = new Inventory(1000); ExecutorService executorService = Executors.newFixedThreadPool(3); for (int i = 0; i < 3; i++) { executorService.execute(() -> { while (inventory.addItem(new Item())) {}; }); } executorService.shutdown(); try { executorService.awaitTermination(5, TimeUnit.SECONDS); } catch (InterruptedException e) { System.out.println("Error waiting for ExecutorService shutdown"); } } } Inventory.java000066400000000000000000000023341264154357600361020ustar00rootroot00000000000000java-design-patterns-1.9.0/double-checked-locking/src/main/java/com/iluwatar/doublechecked/lockingpackage com.iluwatar.doublechecked.locking; import java.util.ArrayList; import java.util.Collections; import java.util.List; import java.util.concurrent.locks.Lock; import java.util.concurrent.locks.ReentrantLock; /** * * Inventory * */ public class Inventory { private final int inventorySize; private final List items; private final Lock lock; /** * Constructor */ public Inventory(int inventorySize) { this.inventorySize = inventorySize; this.items = new ArrayList<>(inventorySize); this.lock = new ReentrantLock(); } /** * Add item */ public boolean addItem(Item item) { if (items.size() < inventorySize) { lock.lock(); try { if (items.size() < inventorySize) { items.add(item); System.out.println(Thread.currentThread() + ": items.size()=" + items.size() + ", inventorySize=" + inventorySize); return true; } } finally { lock.unlock(); } } return false; } /** * Get all the items in the inventory * * @return All the items of the inventory, as an unmodifiable list */ public final List getItems() { return Collections.unmodifiableList(items); } } Item.java000066400000000000000000000001321264154357600347750ustar00rootroot00000000000000java-design-patterns-1.9.0/double-checked-locking/src/main/java/com/iluwatar/doublechecked/lockingpackage com.iluwatar.doublechecked.locking; /** * * Item * */ public class Item { } java-design-patterns-1.9.0/double-checked-locking/src/test/000077500000000000000000000000001264154357600236145ustar00rootroot00000000000000java-design-patterns-1.9.0/double-checked-locking/src/test/java/000077500000000000000000000000001264154357600245355ustar00rootroot00000000000000java-design-patterns-1.9.0/double-checked-locking/src/test/java/com/000077500000000000000000000000001264154357600253135ustar00rootroot00000000000000java-design-patterns-1.9.0/double-checked-locking/src/test/java/com/iluwatar/000077500000000000000000000000001264154357600271435ustar00rootroot00000000000000java-design-patterns-1.9.0/double-checked-locking/src/test/java/com/iluwatar/doublechecked/000077500000000000000000000000001264154357600317245ustar00rootroot00000000000000java-design-patterns-1.9.0/double-checked-locking/src/test/java/com/iluwatar/doublechecked/locking/000077500000000000000000000000001264154357600333525ustar00rootroot00000000000000AppTest.java000066400000000000000000000003211264154357600355120ustar00rootroot00000000000000java-design-patterns-1.9.0/double-checked-locking/src/test/java/com/iluwatar/doublechecked/lockingpackage com.iluwatar.doublechecked.locking; import org.junit.Test; /** * * Application test * */ public class AppTest { @Test public void test() { String[] args = {}; App.main(args); } } InventoryTest.java000066400000000000000000000070331264154357600367760ustar00rootroot00000000000000java-design-patterns-1.9.0/double-checked-locking/src/test/java/com/iluwatar/doublechecked/lockingpackage com.iluwatar.doublechecked.locking; import org.junit.After; import org.junit.Before; import org.junit.Test; import org.mockito.ArgumentCaptor; import java.io.PrintStream; import java.util.List; import java.util.concurrent.ExecutorService; import java.util.concurrent.Executors; import java.util.concurrent.TimeUnit; import static junit.framework.Assert.assertTrue; import static junit.framework.TestCase.assertEquals; import static org.junit.Assert.assertNotNull; import static org.mockito.Mockito.mock; import static org.mockito.Mockito.times; import static org.mockito.Mockito.verify; import static org.mockito.Mockito.verifyNoMoreInteractions; /** * Date: 12/10/15 - 9:34 PM * * @author Jeroen Meulemeester */ public class InventoryTest { /** * The mocked standard out {@link PrintStream}, used to verify a steady increasing size of the * {@link Inventory} while adding items from multiple threads concurrently */ private final PrintStream stdOutMock = mock(PrintStream.class); /** * Keep the original std-out so it can be restored after the test */ private final PrintStream stdOutOrig = System.out; /** * Inject the mocked std-out {@link PrintStream} into the {@link System} class before each test */ @Before public void setUp() { System.setOut(this.stdOutMock); } /** * Removed the mocked std-out {@link PrintStream} again from the {@link System} class */ @After public void tearDown() { System.setOut(this.stdOutOrig); } /** * The number of threads used to stress test the locking of the {@link Inventory#addItem(Item)} * method */ private static final int THREAD_COUNT = 8; /** * The maximum number of {@link Item}s allowed in the {@link Inventory} */ private static final int INVENTORY_SIZE = 1000; /** * Concurrently add multiple items to the inventory, and check if the items were added in order by * checking the stdOut for continuous growth of the inventory. When 'items.size()=xx' shows up out * of order, it means that the locking is not ok, increasing the risk of going over the inventory * item limit. */ @Test(timeout = 10000) public void testAddItem() throws Exception { // Create a new inventory with a limit of 1000 items and put some load on the add method final Inventory inventory = new Inventory(INVENTORY_SIZE); final ExecutorService executorService = Executors.newFixedThreadPool(THREAD_COUNT); for (int i = 0; i < THREAD_COUNT; i++) { executorService.execute(() -> { while (inventory.addItem(new Item())) {}; }); } // Wait until all threads have finished executorService.shutdown(); executorService.awaitTermination(5, TimeUnit.SECONDS); // Check the number of items in the inventory. It should not have exceeded the allowed maximum final List items = inventory.getItems(); assertNotNull(items); assertEquals(INVENTORY_SIZE, items.size()); // Capture all stdOut messages ... final ArgumentCaptor stdOutCaptor = ArgumentCaptor.forClass(String.class); verify(this.stdOutMock, times(INVENTORY_SIZE)).println(stdOutCaptor.capture()); // ... verify if we got all 1000 final List values = stdOutCaptor.getAllValues(); assertEquals(INVENTORY_SIZE, values.size()); // ... and check if the inventory size is increasing continuously for (int i = 0; i < values.size(); i++) { assertNotNull(values.get(i)); assertTrue(values.get(i).contains("items.size()=" + (i + 1))); } verifyNoMoreInteractions(this.stdOutMock); } }java-design-patterns-1.9.0/double-dispatch/000077500000000000000000000000001264154357600206335ustar00rootroot00000000000000java-design-patterns-1.9.0/double-dispatch/etc/000077500000000000000000000000001264154357600214065ustar00rootroot00000000000000java-design-patterns-1.9.0/double-dispatch/etc/double-dispatch.png000066400000000000000000000771541264154357600252010ustar00rootroot00000000000000PNG  IHDRt~3IDATxoW}ժRd]=>Ry"m5-jP\ L )Gi`8qBv4lBZ*o4AH}gߵf5f5k|>h3fYg& V}04h\wLB%}7(Z. 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-&ߔh';CZ\|x/H t:5 !-uHk java-design-patterns-1.9.0/double-dispatch/index.md000066400000000000000000000012371264154357600222670ustar00rootroot00000000000000--- layout: pattern title: Double Dispatch folder: double-dispatch permalink: /patterns/double-dispatch/ categories: Other tags: - Java - Difficulty-Intermediate - Idiom --- **Intent:** Double Dispatch pattern is a way to create maintainable dynamic behavior based on receiver and parameter types. ![alt text](./etc/double-dispatch.png "Double Dispatch") **Applicability:** Use the Double Dispatch pattern when * the dynamic behavior is not defined only based on receiving object's type but also on the receiving method's parameter type. **Real world examples:** * [ObjectOutputStream](https://docs.oracle.com/javase/8/docs/api/java/io/ObjectOutputStream.html) java-design-patterns-1.9.0/double-dispatch/pom.xml000066400000000000000000000013761264154357600221570ustar00rootroot00000000000000 4.0.0 com.iluwatar java-design-patterns 1.9.0 double-dispatch junit junit test org.mockito mockito-core test java-design-patterns-1.9.0/double-dispatch/src/000077500000000000000000000000001264154357600214225ustar00rootroot00000000000000java-design-patterns-1.9.0/double-dispatch/src/main/000077500000000000000000000000001264154357600223465ustar00rootroot00000000000000java-design-patterns-1.9.0/double-dispatch/src/main/java/000077500000000000000000000000001264154357600232675ustar00rootroot00000000000000java-design-patterns-1.9.0/double-dispatch/src/main/java/com/000077500000000000000000000000001264154357600240455ustar00rootroot00000000000000java-design-patterns-1.9.0/double-dispatch/src/main/java/com/iluwatar/000077500000000000000000000000001264154357600256755ustar00rootroot00000000000000java-design-patterns-1.9.0/double-dispatch/src/main/java/com/iluwatar/doubledispatch/000077500000000000000000000000001264154357600306675ustar00rootroot00000000000000java-design-patterns-1.9.0/double-dispatch/src/main/java/com/iluwatar/doubledispatch/App.java000066400000000000000000000041221264154357600322510ustar00rootroot00000000000000package com.iluwatar.doubledispatch; import java.util.ArrayList; import java.util.List; /** * * When a message with a parameter is sent to an object, the resultant behaviour is defined by the implementation of * that method in the receiver. Sometimes the behaviour must also be determined by the type of the parameter. *

* One way to implement this would be to create multiple instanceof-checks for the methods parameter. However, this * creates a maintenance issue. When new types are added we would also need to change the method's implementation and * add a new instanceof-check. This violates the single responsibility principle - a class should have only one reason * to change. *

* Instead of the instanceof-checks a better way is to make another virtual call on the parameter object. This way new * functionality can be easily added without the need to modify existing implementation (open-closed principle). *

* In this example we have hierarchy of objects ({@link GameObject}) that can collide to each other. Each object has its * own coordinates which are checked against the other objects' coordinates. If there is an overlap, then the objects * collide utilizing the Double Dispatch pattern. * */ public class App { /** * Program entry point * * @param args * command line args */ public static void main(String[] args) { // initialize game objects and print their status List objects = new ArrayList<>(); objects.add(new FlamingAsteroid(0, 0, 5, 5)); objects.add(new SpaceStationMir(1, 1, 2, 2)); objects.add(new Meteoroid(10, 10, 15, 15)); objects.add(new SpaceStationIss(12, 12, 14, 14)); objects.stream().forEach(o -> System.out.println(o)); System.out.println(""); // collision check objects.stream().forEach(o1 -> objects.stream().forEach(o2 -> { if (o1 != o2 && o1.intersectsWith(o2)) { o1.collision(o2); } })); System.out.println(""); // output eventual object statuses objects.stream().forEach(o -> System.out.println(o)); System.out.println(""); } } FlamingAsteroid.java000066400000000000000000000005651264154357600345310ustar00rootroot00000000000000java-design-patterns-1.9.0/double-dispatch/src/main/java/com/iluwatar/doubledispatchpackage com.iluwatar.doubledispatch; /** * * Flaming asteroid game object * */ public class FlamingAsteroid extends Meteoroid { public FlamingAsteroid(int left, int top, int right, int bottom) { super(left, top, right, bottom); setOnFire(true); } @Override public void collision(GameObject gameObject) { gameObject.collisionResolve(this); } } java-design-patterns-1.9.0/double-dispatch/src/main/java/com/iluwatar/doubledispatch/GameObject.java000066400000000000000000000021141264154357600335300ustar00rootroot00000000000000package com.iluwatar.doubledispatch; /** * * Game objects have coordinates and some other status information. * */ public abstract class GameObject extends Rectangle { private boolean damaged; private boolean onFire; public GameObject(int left, int top, int right, int bottom) { super(left, top, right, bottom); } @Override public String toString() { return String.format("%s at %s damaged=%b onFire=%b", this.getClass().getSimpleName(), super.toString(), isDamaged(), isOnFire()); } public boolean isOnFire() { return onFire; } public void setOnFire(boolean onFire) { this.onFire = onFire; } public boolean isDamaged() { return damaged; } public void setDamaged(boolean damaged) { this.damaged = damaged; } public abstract void collision(GameObject gameObject); public abstract void collisionResolve(FlamingAsteroid asteroid); public abstract void collisionResolve(Meteoroid meteoroid); public abstract void collisionResolve(SpaceStationMir mir); public abstract void collisionResolve(SpaceStationIss iss); } java-design-patterns-1.9.0/double-dispatch/src/main/java/com/iluwatar/doubledispatch/Meteoroid.java000066400000000000000000000021721264154357600334630ustar00rootroot00000000000000package com.iluwatar.doubledispatch; /** * * Meteoroid game object * */ public class Meteoroid extends GameObject { public Meteoroid(int left, int top, int right, int bottom) { super(left, top, right, bottom); } @Override public void collision(GameObject gameObject) { gameObject.collisionResolve(this); } @Override public void collisionResolve(FlamingAsteroid asteroid) { System.out.println(String.format("%s hits %s.", asteroid.getClass().getSimpleName(), this .getClass().getSimpleName())); } @Override public void collisionResolve(Meteoroid meteoroid) { System.out.println(String.format("%s hits %s.", meteoroid.getClass().getSimpleName(), this .getClass().getSimpleName())); } @Override public void collisionResolve(SpaceStationMir mir) { System.out.println(String.format("%s hits %s.", mir.getClass().getSimpleName(), this.getClass() .getSimpleName())); } @Override public void collisionResolve(SpaceStationIss iss) { System.out.println(String.format("%s hits %s.", iss.getClass().getSimpleName(), this.getClass() .getSimpleName())); } } java-design-patterns-1.9.0/double-dispatch/src/main/java/com/iluwatar/doubledispatch/Rectangle.java000066400000000000000000000016571264154357600334470ustar00rootroot00000000000000package com.iluwatar.doubledispatch; /** * * Rectangle has coordinates and can be checked for overlap against other Rectangles. * */ public class Rectangle { private int left; private int top; private int right; private int bottom; /** * Constructor */ public Rectangle(int left, int top, int right, int bottom) { this.left = left; this.top = top; this.right = right; this.bottom = bottom; } public int getLeft() { return left; } public int getTop() { return top; } public int getRight() { return right; } public int getBottom() { return bottom; } boolean intersectsWith(Rectangle r) { return !(r.getLeft() > getRight() || r.getRight() < getLeft() || r.getTop() > getBottom() || r .getBottom() < getTop()); } @Override public String toString() { return String.format("[%d,%d,%d,%d]", getLeft(), getTop(), getRight(), getBottom()); } } SpaceStationIss.java000066400000000000000000000005471264154357600345350ustar00rootroot00000000000000java-design-patterns-1.9.0/double-dispatch/src/main/java/com/iluwatar/doubledispatchpackage com.iluwatar.doubledispatch; /** * * Space station ISS game object * */ public class SpaceStationIss extends SpaceStationMir { public SpaceStationIss(int left, int top, int right, int bottom) { super(left, top, right, bottom); } @Override public void collision(GameObject gameObject) { gameObject.collisionResolve(this); } } SpaceStationMir.java000066400000000000000000000027661264154357600345330ustar00rootroot00000000000000java-design-patterns-1.9.0/double-dispatch/src/main/java/com/iluwatar/doubledispatchpackage com.iluwatar.doubledispatch; /** * * Space station Mir game object * */ public class SpaceStationMir extends GameObject { public SpaceStationMir(int left, int top, int right, int bottom) { super(left, top, right, bottom); } @Override public void collision(GameObject gameObject) { gameObject.collisionResolve(this); } @Override public void collisionResolve(FlamingAsteroid asteroid) { System.out.println(String.format("%s hits %s. %s is damaged! %s is set on fire!", asteroid .getClass().getSimpleName(), this.getClass().getSimpleName(), this.getClass() .getSimpleName(), this.getClass().getSimpleName())); setDamaged(true); setOnFire(true); } @Override public void collisionResolve(Meteoroid meteoroid) { System.out.println(String.format("%s hits %s. %s is damaged!", meteoroid.getClass() .getSimpleName(), this.getClass().getSimpleName(), this.getClass().getSimpleName())); setDamaged(true); } @Override public void collisionResolve(SpaceStationMir mir) { System.out.println(String.format("%s hits %s. %s is damaged!", mir.getClass().getSimpleName(), this.getClass().getSimpleName(), this.getClass().getSimpleName())); setDamaged(true); } @Override public void collisionResolve(SpaceStationIss iss) { System.out.println(String.format("%s hits %s. %s is damaged!", iss.getClass().getSimpleName(), this.getClass().getSimpleName(), this.getClass().getSimpleName())); setDamaged(true); } } java-design-patterns-1.9.0/double-dispatch/src/test/000077500000000000000000000000001264154357600224015ustar00rootroot00000000000000java-design-patterns-1.9.0/double-dispatch/src/test/java/000077500000000000000000000000001264154357600233225ustar00rootroot00000000000000java-design-patterns-1.9.0/double-dispatch/src/test/java/com/000077500000000000000000000000001264154357600241005ustar00rootroot00000000000000java-design-patterns-1.9.0/double-dispatch/src/test/java/com/iluwatar/000077500000000000000000000000001264154357600257305ustar00rootroot00000000000000java-design-patterns-1.9.0/double-dispatch/src/test/java/com/iluwatar/doubledispatch/000077500000000000000000000000001264154357600307225ustar00rootroot00000000000000java-design-patterns-1.9.0/double-dispatch/src/test/java/com/iluwatar/doubledispatch/AppTest.java000066400000000000000000000003121264154357600331410ustar00rootroot00000000000000package com.iluwatar.doubledispatch; import org.junit.Test; /** * * Application test * */ public class AppTest { @Test public void test() { String[] args = {}; App.main(args); } } CollisionTest.java000066400000000000000000000111611264154357600343010ustar00rootroot00000000000000java-design-patterns-1.9.0/double-dispatch/src/test/java/com/iluwatar/doubledispatchpackage com.iluwatar.doubledispatch; import org.junit.After; import org.junit.Before; import java.io.PrintStream; import java.util.Objects; import static org.junit.Assert.assertEquals; import static org.mockito.Mockito.mock; import static org.mockito.Mockito.times; import static org.mockito.Mockito.verify; import static org.mockito.Mockito.verifyNoMoreInteractions; /** * Date: 12/10/15 - 8:37 PM * * @author Jeroen Meulemeester */ public abstract class CollisionTest { /** * The mocked standard out {@link PrintStream}, required if some of the actions on the tested * object don't have a direct influence on any other accessible objects, except for writing to * std-out using {@link System#out} */ private final PrintStream stdOutMock = mock(PrintStream.class); /** * Keep the original std-out so it can be restored after the test */ private final PrintStream stdOutOrig = System.out; /** * Inject the mocked std-out {@link PrintStream} into the {@link System} class before each test */ @Before public void setUp() { System.setOut(this.stdOutMock); } /** * Removed the mocked std-out {@link PrintStream} again from the {@link System} class */ @After public void tearDown() { System.setOut(this.stdOutOrig); } /** * Get the mocked stdOut {@link PrintStream} * * @return The stdOut print stream mock, renewed before each test */ final PrintStream getStdOutMock() { return this.stdOutMock; } /** * Get the tested object * * @return The tested object, should never return 'null' */ abstract O getTestedObject(); /** * Collide the tested item with the other given item and verify if the damage and fire state is as * expected * * @param other The other object we have to collide with * @param otherDamaged Indicates if the other object should be damaged after the collision * @param otherOnFire Indicates if the other object should be burning after the collision * @param thisDamaged Indicates if the test object should be damaged after the collision * @param thisOnFire Indicates if the other object should be burning after the collision * @param description The expected description of the collision */ void testCollision(final GameObject other, final boolean otherDamaged, final boolean otherOnFire, final boolean thisDamaged, final boolean thisOnFire, final String description) { Objects.requireNonNull(other); Objects.requireNonNull(getTestedObject()); final O tested = getTestedObject(); tested.collision(other); verify(getStdOutMock(), times(1)).println(description); verifyNoMoreInteractions(getStdOutMock()); testOnFire(other, tested, otherOnFire); testDamaged(other, tested, otherDamaged); testOnFire(tested, other, thisOnFire); testDamaged(tested, other, thisDamaged); } /** * Test if the fire state of the target matches the expected state after colliding with the given * object * * @param target The target object * @param other The other object * @param expectTargetOnFire The expected state of fire on the target object */ private void testOnFire(final GameObject target, final GameObject other, final boolean expectTargetOnFire) { final String targetName = target.getClass().getSimpleName(); final String otherName = other.getClass().getSimpleName(); final String errorMessage = expectTargetOnFire ? "Expected [" + targetName + "] to be on fire after colliding with [" + otherName + "] but it was not!" : "Expected [" + targetName + "] not to be on fire after colliding with [" + otherName + "] but it was!"; assertEquals(errorMessage, expectTargetOnFire, target.isOnFire()); } /** * Test if the damage state of the target matches the expected state after colliding with the * given object * * @param target The target object * @param other The other object * @param expectedDamage The expected state of damage on the target object */ private void testDamaged(final GameObject target, final GameObject other, final boolean expectedDamage) { final String targetName = target.getClass().getSimpleName(); final String otherName = other.getClass().getSimpleName(); final String errorMessage = expectedDamage ? "Expected [" + targetName + "] to be damaged after colliding with [" + otherName + "] but it was not!" : "Expected [" + targetName + "] not to be damaged after colliding with [" + otherName + "] but it was!"; assertEquals(errorMessage, expectedDamage, target.isDamaged()); } } FlamingAsteroidTest.java000066400000000000000000000041461264154357600354230ustar00rootroot00000000000000java-design-patterns-1.9.0/double-dispatch/src/test/java/com/iluwatar/doubledispatchpackage com.iluwatar.doubledispatch; import org.junit.Test; import static org.junit.Assert.assertEquals; import static org.junit.Assert.assertFalse; import static org.junit.Assert.assertTrue; /** * Date: 12/10/15 - 11:31 PM * * @author Jeroen Meulemeester */ public class FlamingAsteroidTest extends CollisionTest { @Override final FlamingAsteroid getTestedObject() { return new FlamingAsteroid(1, 2, 3, 4); } /** * Test the constructor parameters */ @Test public void testConstructor() { final FlamingAsteroid asteroid = new FlamingAsteroid(1, 2, 3, 4); assertEquals(1, asteroid.getLeft()); assertEquals(2, asteroid.getTop()); assertEquals(3, asteroid.getRight()); assertEquals(4, asteroid.getBottom()); assertTrue(asteroid.isOnFire()); assertFalse(asteroid.isDamaged()); assertEquals("FlamingAsteroid at [1,2,3,4] damaged=false onFire=true", asteroid.toString()); } /** * Test what happens we collide with an asteroid */ @Test public void testCollideFlamingAsteroid() { testCollision( new FlamingAsteroid(1, 2, 3, 4), false, true, false, true, "FlamingAsteroid hits FlamingAsteroid." ); } /** * Test what happens we collide with an meteoroid */ @Test public void testCollideMeteoroid() { testCollision( new Meteoroid(1, 1, 3, 4), false, false, false, true, "FlamingAsteroid hits Meteoroid." ); } /** * Test what happens we collide with ISS */ @Test public void testCollideSpaceStationIss() { testCollision( new SpaceStationIss(1, 1, 3, 4), true, true, false, true, "FlamingAsteroid hits SpaceStationIss. SpaceStationIss is damaged! SpaceStationIss is set on fire!" ); } /** * Test what happens we collide with MIR */ @Test public void testCollideSpaceStationMir() { testCollision( new SpaceStationMir(1, 1, 3, 4), true, true, false, true, "FlamingAsteroid hits SpaceStationMir. SpaceStationMir is damaged! SpaceStationMir is set on fire!" ); } }MeteoroidTest.java000066400000000000000000000037111264154357600342770ustar00rootroot00000000000000java-design-patterns-1.9.0/double-dispatch/src/test/java/com/iluwatar/doubledispatchpackage com.iluwatar.doubledispatch; import org.junit.Test; import static org.junit.Assert.assertEquals; import static org.junit.Assert.assertFalse; /** * Date: 12/10/15 - 11:31 PM * * @author Jeroen Meulemeester */ public class MeteoroidTest extends CollisionTest { @Override final Meteoroid getTestedObject() { return new Meteoroid(1, 2, 3, 4); } /** * Test the constructor parameters */ @Test public void testConstructor() { final Meteoroid meteoroid = new Meteoroid(1, 2, 3, 4); assertEquals(1, meteoroid.getLeft()); assertEquals(2, meteoroid.getTop()); assertEquals(3, meteoroid.getRight()); assertEquals(4, meteoroid.getBottom()); assertFalse(meteoroid.isOnFire()); assertFalse(meteoroid.isDamaged()); assertEquals("Meteoroid at [1,2,3,4] damaged=false onFire=false", meteoroid.toString()); } /** * Test what happens we collide with an asteroid */ @Test public void testCollideFlamingAsteroid() { testCollision( new FlamingAsteroid(1, 1, 3, 4), false, true, false, false, "Meteoroid hits FlamingAsteroid." ); } /** * Test what happens we collide with an meteoroid */ @Test public void testCollideMeteoroid() { testCollision( new Meteoroid(1, 1, 3, 4), false, false, false, false, "Meteoroid hits Meteoroid." ); } /** * Test what happens we collide with ISS */ @Test public void testCollideSpaceStationIss() { testCollision( new SpaceStationIss(1, 1, 3, 4), true, false, false, false, "Meteoroid hits SpaceStationIss. SpaceStationIss is damaged!" ); } /** * Test what happens we collide with MIR */ @Test public void testCollideSpaceStationMir() { testCollision( new SpaceStationMir(1, 1, 3, 4), true, false, false, false, "Meteoroid hits SpaceStationMir. SpaceStationMir is damaged!" ); } }RectangleTest.java000066400000000000000000000026511264154357600342560ustar00rootroot00000000000000java-design-patterns-1.9.0/double-dispatch/src/test/java/com/iluwatar/doubledispatchpackage com.iluwatar.doubledispatch; import org.junit.Test; import static junit.framework.TestCase.assertEquals; import static org.junit.Assert.assertFalse; import static org.junit.Assert.assertTrue; /** * Unit test for Rectangle */ public class RectangleTest { /** * Test if the values passed through the constructor matches the values fetched from the getters */ @Test public void testConstructor() { final Rectangle rectangle = new Rectangle(1, 2, 3, 4); assertEquals(1, rectangle.getLeft()); assertEquals(2, rectangle.getTop()); assertEquals(3, rectangle.getRight()); assertEquals(4, rectangle.getBottom()); } /** * Test if the values passed through the constructor matches the values in the {@link * #toString()} */ @Test public void testToString() throws Exception { final Rectangle rectangle = new Rectangle(1, 2, 3, 4); assertEquals("[1,2,3,4]", rectangle.toString()); } /** * Test if the {@link Rectangle} class can detect if it intersects with another rectangle. */ @Test public void testIntersection() { assertTrue(new Rectangle(0, 0, 1, 1).intersectsWith(new Rectangle(0, 0, 1, 1))); assertTrue(new Rectangle(0, 0, 1, 1).intersectsWith(new Rectangle(-1, -5, 7, 8))); assertFalse(new Rectangle(0, 0, 1, 1).intersectsWith(new Rectangle(2, 2, 3, 3))); assertFalse(new Rectangle(0, 0, 1, 1).intersectsWith(new Rectangle(-2, -2, -1, -1))); } } SpaceStationIssTest.java000066400000000000000000000037331264154357600354300ustar00rootroot00000000000000java-design-patterns-1.9.0/double-dispatch/src/test/java/com/iluwatar/doubledispatchpackage com.iluwatar.doubledispatch; import org.junit.Test; import static org.junit.Assert.assertEquals; import static org.junit.Assert.assertFalse; /** * Date: 12/10/15 - 11:31 PM * * @author Jeroen Meulemeester */ public class SpaceStationIssTest extends CollisionTest { @Override final SpaceStationIss getTestedObject() { return new SpaceStationIss(1, 2, 3, 4); } /** * Test the constructor parameters */ @Test public void testConstructor() { final SpaceStationIss iss = new SpaceStationIss(1, 2, 3, 4); assertEquals(1, iss.getLeft()); assertEquals(2, iss.getTop()); assertEquals(3, iss.getRight()); assertEquals(4, iss.getBottom()); assertFalse(iss.isOnFire()); assertFalse(iss.isDamaged()); assertEquals("SpaceStationIss at [1,2,3,4] damaged=false onFire=false", iss.toString()); } /** * Test what happens we collide with an asteroid */ @Test public void testCollideFlamingAsteroid() { testCollision( new FlamingAsteroid(1, 1, 3, 4), false, true, false, false, "SpaceStationIss hits FlamingAsteroid." ); } /** * Test what happens we collide with an meteoroid */ @Test public void testCollideMeteoroid() { testCollision( new Meteoroid(1, 1, 3, 4), false, false, false, false, "SpaceStationIss hits Meteoroid." ); } /** * Test what happens we collide with ISS */ @Test public void testCollideSpaceStationIss() { testCollision( new SpaceStationIss(1, 1, 3, 4), true, false, false, false, "SpaceStationIss hits SpaceStationIss. SpaceStationIss is damaged!" ); } /** * Test what happens we collide with MIR */ @Test public void testCollideSpaceStationMir() { testCollision( new SpaceStationMir(1, 1, 3, 4), true, false, false, false, "SpaceStationIss hits SpaceStationMir. SpaceStationMir is damaged!" ); } }SpaceStationMirTest.java000066400000000000000000000037331264154357600354210ustar00rootroot00000000000000java-design-patterns-1.9.0/double-dispatch/src/test/java/com/iluwatar/doubledispatchpackage com.iluwatar.doubledispatch; import org.junit.Test; import static org.junit.Assert.assertEquals; import static org.junit.Assert.assertFalse; /** * Date: 12/10/15 - 11:31 PM * * @author Jeroen Meulemeester */ public class SpaceStationMirTest extends CollisionTest { @Override final SpaceStationMir getTestedObject() { return new SpaceStationMir(1, 2, 3, 4); } /** * Test the constructor parameters */ @Test public void testConstructor() { final SpaceStationMir mir = new SpaceStationMir(1, 2, 3, 4); assertEquals(1, mir.getLeft()); assertEquals(2, mir.getTop()); assertEquals(3, mir.getRight()); assertEquals(4, mir.getBottom()); assertFalse(mir.isOnFire()); assertFalse(mir.isDamaged()); assertEquals("SpaceStationMir at [1,2,3,4] damaged=false onFire=false", mir.toString()); } /** * Test what happens we collide with an asteroid */ @Test public void testCollideFlamingAsteroid() { testCollision( new FlamingAsteroid(1, 1, 3, 4), false, true, false, false, "SpaceStationMir hits FlamingAsteroid." ); } /** * Test what happens we collide with an meteoroid */ @Test public void testCollideMeteoroid() { testCollision( new Meteoroid(1, 1, 3, 4), false, false, false, false, "SpaceStationMir hits Meteoroid." ); } /** * Test what happens we collide with ISS */ @Test public void testCollideSpaceStationIss() { testCollision( new SpaceStationIss(1, 1, 3, 4), true, false, false, false, "SpaceStationMir hits SpaceStationIss. SpaceStationIss is damaged!" ); } /** * Test what happens we collide with MIR */ @Test public void testCollideSpaceStationMir() { testCollision( new SpaceStationMir(1, 1, 3, 4), true, false, false, false, "SpaceStationMir hits SpaceStationMir. 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The client has to find and register for each object individually, if each object has multiple events then each event requires a separate subscription. An Event Aggregator acts as a single source of events for many objects. It registers for all the events of the many objects allowing clients to register with just the aggregator. ![alt text](./etc/classes.png "Event Aggregator") **Applicability:** Use the Event Aggregator pattern when * Event Aggregator is a good choice when you have lots of objects that are potential event sources. Rather than have the observer deal with registering with them all, you can centralize the registration logic to the Event Aggregator. As well as simplifying registration, a Event Aggregator also simplifies the memory management issues in using observers. **Credits:** * [Martin Fowler - Event Aggregator](http://martinfowler.com/eaaDev/EventAggregator.html) java-design-patterns-1.9.0/event-aggregator/pom.xml000066400000000000000000000013001264154357600223340ustar00rootroot00000000000000 4.0.0 com.iluwatar java-design-patterns 1.9.0 event-aggregator junit junit test org.mockito mockito-core test java-design-patterns-1.9.0/event-aggregator/src/000077500000000000000000000000001264154357600216145ustar00rootroot00000000000000java-design-patterns-1.9.0/event-aggregator/src/main/000077500000000000000000000000001264154357600225405ustar00rootroot00000000000000java-design-patterns-1.9.0/event-aggregator/src/main/java/000077500000000000000000000000001264154357600234615ustar00rootroot00000000000000java-design-patterns-1.9.0/event-aggregator/src/main/java/com/000077500000000000000000000000001264154357600242375ustar00rootroot00000000000000java-design-patterns-1.9.0/event-aggregator/src/main/java/com/iluwatar/000077500000000000000000000000001264154357600260675ustar00rootroot00000000000000java-design-patterns-1.9.0/event-aggregator/src/main/java/com/iluwatar/event/000077500000000000000000000000001264154357600272105ustar00rootroot00000000000000java-design-patterns-1.9.0/event-aggregator/src/main/java/com/iluwatar/event/aggregator/000077500000000000000000000000001264154357600313325ustar00rootroot00000000000000java-design-patterns-1.9.0/event-aggregator/src/main/java/com/iluwatar/event/aggregator/App.java000066400000000000000000000025361264154357600327230ustar00rootroot00000000000000package com.iluwatar.event.aggregator; import java.util.ArrayList; import java.util.List; /** * * A system with lots of objects can lead to complexities when a client wants to subscribe to * events. The client has to find and register for each object individually, if each object has * multiple events then each event requires a separate subscription. *

* An Event Aggregator acts as a single source of events for many objects. It registers for all the * events of the many objects allowing clients to register with just the aggregator. *

* In the example {@link LordBaelish}, {@link LordVarys} and {@link Scout} deliver events to * {@link KingsHand}. {@link KingsHand}, the event aggregator, then delivers the events to * {@link KingJoffrey}. * */ public class App { /** * Program entry point * * @param args command line args */ public static void main(String[] args) { KingJoffrey kingJoffrey = new KingJoffrey(); KingsHand kingsHand = new KingsHand(kingJoffrey); List emitters = new ArrayList<>(); emitters.add(kingsHand); emitters.add(new LordBaelish(kingsHand)); emitters.add(new LordVarys(kingsHand)); emitters.add(new Scout(kingsHand)); for (Weekday day : Weekday.values()) { for (EventEmitter emitter : emitters) { emitter.timePasses(day); } } } } java-design-patterns-1.9.0/event-aggregator/src/main/java/com/iluwatar/event/aggregator/Event.java000066400000000000000000000006011264154357600332530ustar00rootroot00000000000000package com.iluwatar.event.aggregator; /** * * Event enumeration. * */ public enum Event { STARK_SIGHTED("Stark sighted"), WARSHIPS_APPROACHING("Warships approaching"), TRAITOR_DETECTED( "Traitor detected"); private String description; Event(String description) { this.description = description; } public String toString() { return description; } } EventEmitter.java000066400000000000000000000012341264154357600345310ustar00rootroot00000000000000java-design-patterns-1.9.0/event-aggregator/src/main/java/com/iluwatar/event/aggregatorpackage com.iluwatar.event.aggregator; import java.util.LinkedList; import java.util.List; /** * * EventEmitter is the base class for event producers that can be observed. * */ public abstract class EventEmitter { private List observers; public EventEmitter() { observers = new LinkedList<>(); } public EventEmitter(EventObserver obs) { this(); registerObserver(obs); } public void registerObserver(EventObserver obs) { observers.add(obs); } protected void notifyObservers(Event e) { for (EventObserver obs : observers) { obs.onEvent(e); } } public abstract void timePasses(Weekday day); } EventObserver.java000066400000000000000000000002461264154357600347110ustar00rootroot00000000000000java-design-patterns-1.9.0/event-aggregator/src/main/java/com/iluwatar/event/aggregatorpackage com.iluwatar.event.aggregator; /** * * Observers of events implement this interface. * */ public interface EventObserver { void onEvent(Event e); } KingJoffrey.java000066400000000000000000000004461264154357600343370ustar00rootroot00000000000000java-design-patterns-1.9.0/event-aggregator/src/main/java/com/iluwatar/event/aggregatorpackage com.iluwatar.event.aggregator; /** * * KingJoffrey observes events from {@link KingsHand}. * */ public class KingJoffrey implements EventObserver { @Override public void onEvent(Event e) { System.out.println("Received event from the King's Hand: " + e.toString()); } } KingsHand.java000066400000000000000000000007071264154357600337700ustar00rootroot00000000000000java-design-patterns-1.9.0/event-aggregator/src/main/java/com/iluwatar/event/aggregatorpackage com.iluwatar.event.aggregator; /** * * KingsHand observes events from multiple sources and delivers them to listeners. * */ public class KingsHand extends EventEmitter implements EventObserver { public KingsHand() { super(); } public KingsHand(EventObserver obs) { super(obs); } @Override public void onEvent(Event e) { notifyObservers(e); } @Override public void timePasses(Weekday day) { // NOP } } LordBaelish.java000066400000000000000000000006041264154357600343060ustar00rootroot00000000000000java-design-patterns-1.9.0/event-aggregator/src/main/java/com/iluwatar/event/aggregatorpackage com.iluwatar.event.aggregator; /** * * LordBaelish produces events. * */ public class LordBaelish extends EventEmitter { public LordBaelish() { super(); } public LordBaelish(EventObserver obs) { super(obs); } @Override public void timePasses(Weekday day) { if (day.equals(Weekday.FRIDAY)) { notifyObservers(Event.STARK_SIGHTED); } } } LordVarys.java000066400000000000000000000006011264154357600340400ustar00rootroot00000000000000java-design-patterns-1.9.0/event-aggregator/src/main/java/com/iluwatar/event/aggregatorpackage com.iluwatar.event.aggregator; /** * * LordVarys produces events. * */ public class LordVarys extends EventEmitter { public LordVarys() { super(); } public LordVarys(EventObserver obs) { super(obs); } @Override public void timePasses(Weekday day) { if (day.equals(Weekday.SATURDAY)) { notifyObservers(Event.TRAITOR_DETECTED); } } } java-design-patterns-1.9.0/event-aggregator/src/main/java/com/iluwatar/event/aggregator/Scout.java000066400000000000000000000005641264154357600332770ustar00rootroot00000000000000package com.iluwatar.event.aggregator; /** * * Scout produces events. * */ public class Scout extends EventEmitter { public Scout() { super(); } public Scout(EventObserver obs) { super(obs); } @Override public void timePasses(Weekday day) { if (day.equals(Weekday.TUESDAY)) { notifyObservers(Event.WARSHIPS_APPROACHING); } } } java-design-patterns-1.9.0/event-aggregator/src/main/java/com/iluwatar/event/aggregator/Weekday.java000066400000000000000000000006401264154357600335660ustar00rootroot00000000000000package com.iluwatar.event.aggregator; /** * * Weekday enumeration * */ public enum Weekday { MONDAY("Monday"), TUESDAY("Tuesday"), WEDNESDAY("Wednesday"), THURSDAY("Thursday"), FRIDAY( "Friday"), SATURDAY("Saturday"), SUNDAY("Sunday"); private String description; Weekday(String description) { this.description = description; } public String toString() { return description; } } java-design-patterns-1.9.0/event-aggregator/src/test/000077500000000000000000000000001264154357600225735ustar00rootroot00000000000000java-design-patterns-1.9.0/event-aggregator/src/test/java/000077500000000000000000000000001264154357600235145ustar00rootroot00000000000000java-design-patterns-1.9.0/event-aggregator/src/test/java/com/000077500000000000000000000000001264154357600242725ustar00rootroot00000000000000java-design-patterns-1.9.0/event-aggregator/src/test/java/com/iluwatar/000077500000000000000000000000001264154357600261225ustar00rootroot00000000000000java-design-patterns-1.9.0/event-aggregator/src/test/java/com/iluwatar/event/000077500000000000000000000000001264154357600272435ustar00rootroot00000000000000java-design-patterns-1.9.0/event-aggregator/src/test/java/com/iluwatar/event/aggregator/000077500000000000000000000000001264154357600313655ustar00rootroot00000000000000java-design-patterns-1.9.0/event-aggregator/src/test/java/com/iluwatar/event/aggregator/AppTest.java000066400000000000000000000003141264154357600336060ustar00rootroot00000000000000package com.iluwatar.event.aggregator; import org.junit.Test; /** * * Application test * */ public class AppTest { @Test public void test() { String[] args = {}; App.main(args); } } EventEmitterTest.java000066400000000000000000000112461264154357600354300ustar00rootroot00000000000000java-design-patterns-1.9.0/event-aggregator/src/test/java/com/iluwatar/event/aggregatorpackage com.iluwatar.event.aggregator; import org.junit.Test; import java.util.Objects; import java.util.function.Function; import java.util.function.Supplier; import static org.mockito.Matchers.eq; import static org.mockito.Mockito.mock; import static org.mockito.Mockito.times; import static org.mockito.Mockito.verify; import static org.mockito.Mockito.verifyZeroInteractions; import static org.mockito.Mockito.verifyNoMoreInteractions; /** * Date: 12/12/15 - 10:58 PM * * @author Jeroen Meulemeester */ public abstract class EventEmitterTest { /** * Factory used to create a new instance of the test object with a default observer */ private final Function factoryWithDefaultObserver; /** * Factory used to create a new instance of the test object without passing a default observer */ private final Supplier factoryWithoutDefaultObserver; /** * The day of the week an event is expected */ private final Weekday specialDay; /** * The expected event, emitted on the special day */ private final Event event; /** * Create a new event emitter test, using the given test object factories, special day and event */ EventEmitterTest(final Weekday specialDay, final Event event, final Function factoryWithDefaultObserver, final Supplier factoryWithoutDefaultObserver) { this.specialDay = specialDay; this.event = event; this.factoryWithDefaultObserver = Objects.requireNonNull(factoryWithDefaultObserver); this.factoryWithoutDefaultObserver = Objects.requireNonNull(factoryWithoutDefaultObserver); } /** * Go over every day of the month, and check if the event is emitted on the given day. This test * is executed twice, once without a default emitter and once with */ @Test public void testAllDays() { testAllDaysWithoutDefaultObserver(specialDay, event); testAllDaysWithDefaultObserver(specialDay, event); } /** * Pass each week of the day, day by day to the event emitter and verify of the given observers * received the correct event on the special day. * * @param specialDay The special day on which an event is emitted * @param event The expected event emitted by the test object * @param emitter The event emitter * @param observers The registered observer mocks */ private void testAllDays(final Weekday specialDay, final Event event, final E emitter, final EventObserver... observers) { for (final Weekday weekday : Weekday.values()) { // Pass each week of the day, day by day to the event emitter emitter.timePasses(weekday); if (weekday == specialDay) { // On a special day, every observer should have received the event for (final EventObserver observer : observers) { verify(observer, times(1)).onEvent(eq(event)); } } else { // On any other normal day, the observers should have received nothing at all verifyZeroInteractions(observers); } } // The observers should not have received any additional events after the week verifyNoMoreInteractions(observers); } /** * Go over every day of the month, and check if the event is emitted on the given day. Use an * event emitter without a default observer * * @param specialDay The special day on which an event is emitted * @param event The expected event emitted by the test object */ private void testAllDaysWithoutDefaultObserver(final Weekday specialDay, final Event event) { final EventObserver observer1 = mock(EventObserver.class); final EventObserver observer2 = mock(EventObserver.class); final E emitter = this.factoryWithoutDefaultObserver.get(); emitter.registerObserver(observer1); emitter.registerObserver(observer2); testAllDays(specialDay, event, emitter, observer1, observer2); } /** * Go over every day of the month, and check if the event is emitted on the given day. * * @param specialDay The special day on which an event is emitted * @param event The expected event emitted by the test object */ private void testAllDaysWithDefaultObserver(final Weekday specialDay, final Event event) { final EventObserver defaultObserver = mock(EventObserver.class); final EventObserver observer1 = mock(EventObserver.class); final EventObserver observer2 = mock(EventObserver.class); final E emitter = this.factoryWithDefaultObserver.apply(defaultObserver); emitter.registerObserver(observer1); emitter.registerObserver(observer2); testAllDays(specialDay, event, emitter, defaultObserver, observer1, observer2); } } EventTest.java000066400000000000000000000010471264154357600340740ustar00rootroot00000000000000java-design-patterns-1.9.0/event-aggregator/src/test/java/com/iluwatar/event/aggregatorpackage com.iluwatar.event.aggregator; import org.junit.Test; import static org.junit.Assert.assertFalse; import static org.junit.Assert.assertNotNull; /** * Date: 12/12/15 - 2:52 PM * * @author Jeroen Meulemeester */ public class EventTest { /** * Verify if every event has a non-null, non-empty description */ @Test public void testToString() { for (final Event event : Event.values()) { final String toString = event.toString(); assertNotNull(toString); assertFalse(toString.trim().isEmpty()); } } }KingJoffreyTest.java000066400000000000000000000033201264154357600352240ustar00rootroot00000000000000java-design-patterns-1.9.0/event-aggregator/src/test/java/com/iluwatar/event/aggregatorpackage com.iluwatar.event.aggregator; import org.junit.After; import org.junit.Before; import org.junit.Test; import java.io.PrintStream; import static org.mockito.Mockito.mock; import static org.mockito.Mockito.times; import static org.mockito.Mockito.verify; import static org.mockito.Mockito.verifyZeroInteractions; import static org.mockito.Mockito.verifyNoMoreInteractions; /** * Date: 12/12/15 - 3:04 PM * * @author Jeroen Meulemeester */ public class KingJoffreyTest { /** * The mocked standard out {@link PrintStream}, required since {@link KingJoffrey} does nothing * except for writing to std-out using {@link System#out} */ private final PrintStream stdOutMock = mock(PrintStream.class); /** * Keep the original std-out so it can be restored after the test */ private final PrintStream stdOutOrig = System.out; /** * Inject the mocked std-out {@link PrintStream} into the {@link System} class before each test */ @Before public void setUp() { System.setOut(this.stdOutMock); } /** * Removed the mocked std-out {@link PrintStream} again from the {@link System} class */ @After public void tearDown() { System.setOut(this.stdOutOrig); } /** * Test if {@link KingJoffrey} tells us what event he received */ @Test public void testOnEvent() { final KingJoffrey kingJoffrey = new KingJoffrey(); for (final Event event : Event.values()) { verifyZeroInteractions(this.stdOutMock); kingJoffrey.onEvent(event); final String expectedMessage = "Received event from the King's Hand: " + event.toString(); verify(this.stdOutMock, times(1)).println(expectedMessage); verifyNoMoreInteractions(this.stdOutMock); } } }KingsHandTest.java000066400000000000000000000026521264154357600346640ustar00rootroot00000000000000java-design-patterns-1.9.0/event-aggregator/src/test/java/com/iluwatar/event/aggregatorpackage com.iluwatar.event.aggregator; import org.junit.Test; import static org.mockito.Matchers.eq; import static org.mockito.Mockito.mock; import static org.mockito.Mockito.times; import static org.mockito.Mockito.verify; import static org.mockito.Mockito.verifyZeroInteractions; import static org.mockito.Mockito.verifyNoMoreInteractions; /** * Date: 12/12/15 - 10:57 AM * * @author Jeroen Meulemeester */ public class KingsHandTest extends EventEmitterTest { /** * Create a new test instance, using the correct object factory */ public KingsHandTest() { super(null, null, KingsHand::new, KingsHand::new); } /** * The {@link KingsHand} is both an {@link EventEmitter} as an {@link EventObserver} so verify if every * event received is passed up to it's superior, in most cases {@link KingJoffrey} but now just a * mocked observer. */ @Test public void testPassThrough() throws Exception { final EventObserver observer = mock(EventObserver.class); final KingsHand kingsHand = new KingsHand(observer); // The kings hand should not pass any events before he received one verifyZeroInteractions(observer); // Verify if each event is passed on to the observer, nothing less, nothing more. for (final Event event : Event.values()) { kingsHand.onEvent(event); verify(observer, times(1)).onEvent(eq(event)); verifyNoMoreInteractions(observer); } } }LordBaelishTest.java000066400000000000000000000005721264154357600352050ustar00rootroot00000000000000java-design-patterns-1.9.0/event-aggregator/src/test/java/com/iluwatar/event/aggregatorpackage com.iluwatar.event.aggregator; /** * Date: 12/12/15 - 10:57 AM * * @author Jeroen Meulemeester */ public class LordBaelishTest extends EventEmitterTest { /** * Create a new test instance, using the correct object factory */ public LordBaelishTest() { super(Weekday.FRIDAY, Event.STARK_SIGHTED, LordBaelish::new, LordBaelish::new); } }LordVarysTest.java000066400000000000000000000005651264154357600347440ustar00rootroot00000000000000java-design-patterns-1.9.0/event-aggregator/src/test/java/com/iluwatar/event/aggregatorpackage com.iluwatar.event.aggregator; /** * Date: 12/12/15 - 10:57 AM * * @author Jeroen Meulemeester */ public class LordVarysTest extends EventEmitterTest { /** * Create a new test instance, using the correct object factory */ public LordVarysTest() { super(Weekday.SATURDAY, Event.TRAITOR_DETECTED, LordVarys::new, LordVarys::new); } }ScoutTest.java000066400000000000000000000005441264154357600341110ustar00rootroot00000000000000java-design-patterns-1.9.0/event-aggregator/src/test/java/com/iluwatar/event/aggregatorpackage com.iluwatar.event.aggregator; /** * Date: 12/12/15 - 10:57 AM * * @author Jeroen Meulemeester */ public class ScoutTest extends EventEmitterTest { /** * Create a new test instance, using the correct object factory */ public ScoutTest() { super(Weekday.TUESDAY, Event.WARSHIPS_APPROACHING, Scout::new, Scout::new); } }WeekdayTest.java000066400000000000000000000010041264154357600343750ustar00rootroot00000000000000java-design-patterns-1.9.0/event-aggregator/src/test/java/com/iluwatar/event/aggregatorpackage com.iluwatar.event.aggregator; import org.junit.Test; import static org.junit.Assert.assertEquals; import static org.junit.Assert.assertNotNull; /** * Date: 12/12/15 - 2:12 PM * * @author Jeroen Meulemeester */ public class WeekdayTest { @Test public void testToString() throws Exception { for (final Weekday weekday : Weekday.values()) { final String toString = weekday.toString(); assertNotNull(toString); assertEquals(weekday.name(), toString.toUpperCase()); } } }java-design-patterns-1.9.0/exclude-pmd.properties000066400000000000000000000003451264154357600221130ustar00rootroot00000000000000com.iluwatar.servicelayer.common.BaseEntity=UnusedPrivateField com.iluwatar.doublechecked.locking.App=EmptyStatementNotInLoop,EmptyWhileStmt com.iluwatar.doublechecked.locking.InventoryTest=EmptyStatementNotInLoop,EmptyWhileStmt java-design-patterns-1.9.0/execute-around/000077500000000000000000000000001264154357600205145ustar00rootroot00000000000000java-design-patterns-1.9.0/execute-around/etc/000077500000000000000000000000001264154357600212675ustar00rootroot00000000000000java-design-patterns-1.9.0/execute-around/etc/execute-around.png000066400000000000000000000107541264154357600247340ustar00rootroot00000000000000PNG  IHDR^.2IDATx'i@_1}W5u4Ac[.KEº1^D`h:̞{̙Ι33mQ u # BQհOXv T>j . \ \pa7patAy΂Xͨ7 73V]5v / ssl֍ cf3bpׁ wՅ;T0[EOj,k4cglL[rڲsye!, $ ]*.dʾё/!T V3$pB-5coH$;t{< +UtBb/怓fpe%"HVou^bFl\BW Q)\W<[$Kl,,KMsmHt3QFtX!Jp/țsa|ۤ塴3kGZ#Rg@1.G2m_ق9) ˅H]Ȱbq7ޯ|خr-FHgXqX߻p;}c׍vbH3ﶔ`jF[XCu\n6-mT 3Hpdjl MGivDm(@i4 }'\Xx; 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Wf̃6_/T& W8pp'E3$$Pz \uiRU̍Z U,$:BOq+ ŅUC³OX³ӹr(CTA2嚅 N?vî۷zj|۩qp%S a[8([v6F:&!F{Dܲdy - Fv6]9]8V5tZ&i۬ND߃" W{!wt-j;w:߲ ZOT}C\vx S$Pxm:F?RZ[^ȲR8G_x3BAa8W dNd.\lU WrwV<"4:k 7g\Z)"#`wpbro}ϫh],@6B^6⟰Gٌ,slńא.>vH ꧽ*BQ|vđcc|!J@b+F7Xfp3% f"-GG; r}ndp1.hy#t java-design-patterns-1.9.0/execute-around/index.md000066400000000000000000000012121264154357600221410ustar00rootroot00000000000000--- layout: pattern title: Execute Around folder: execute-around permalink: /patterns/execute-around/ categories: Other tags: - Java - Difficulty-Beginner - Idiom --- **Intent:** Execute Around idiom frees the user from certain actions that should always be executed before and after the business method. A good example of this is resource allocation and deallocation leaving the user to specify only what to do with the resource. ![alt text](./etc/execute-around.png "Execute Around") **Applicability:** Use the Execute Around idiom when * you use an API that requires methods to be called in pairs such as open/close or allocate/deallocate. java-design-patterns-1.9.0/execute-around/pom.xml000066400000000000000000000011571264154357600220350ustar00rootroot00000000000000 4.0.0 com.iluwatar java-design-patterns 1.9.0 execute-around junit junit test java-design-patterns-1.9.0/execute-around/src/000077500000000000000000000000001264154357600213035ustar00rootroot00000000000000java-design-patterns-1.9.0/execute-around/src/main/000077500000000000000000000000001264154357600222275ustar00rootroot00000000000000java-design-patterns-1.9.0/execute-around/src/main/java/000077500000000000000000000000001264154357600231505ustar00rootroot00000000000000java-design-patterns-1.9.0/execute-around/src/main/java/com/000077500000000000000000000000001264154357600237265ustar00rootroot00000000000000java-design-patterns-1.9.0/execute-around/src/main/java/com/iluwatar/000077500000000000000000000000001264154357600255565ustar00rootroot00000000000000java-design-patterns-1.9.0/execute-around/src/main/java/com/iluwatar/execute/000077500000000000000000000000001264154357600272205ustar00rootroot00000000000000java-design-patterns-1.9.0/execute-around/src/main/java/com/iluwatar/execute/around/000077500000000000000000000000001264154357600305105ustar00rootroot00000000000000java-design-patterns-1.9.0/execute-around/src/main/java/com/iluwatar/execute/around/App.java000066400000000000000000000016761264154357600321050ustar00rootroot00000000000000package com.iluwatar.execute.around; import java.io.FileWriter; import java.io.IOException; /** * The Execute Around idiom specifies some code to be executed before and after a method. Typically * the idiom is used when the API has methods to be executed in pairs, such as resource * allocation/deallocation or lock acquisition/release. *

* In this example, we have {@link SimpleFileWriter} class that opens and closes the file for the * user. The user specifies only what to do with the file by providing the {@link FileWriterAction} * implementation. * */ public class App { /** * Program entry point */ public static void main(String[] args) throws IOException { new SimpleFileWriter("testfile.txt", new FileWriterAction() { @Override public void writeFile(FileWriter writer) throws IOException { writer.write("Hello"); writer.append(" "); writer.append("there!"); } }); } } FileWriterAction.java000066400000000000000000000004141264154357600345050ustar00rootroot00000000000000java-design-patterns-1.9.0/execute-around/src/main/java/com/iluwatar/execute/aroundpackage com.iluwatar.execute.around; import java.io.FileWriter; import java.io.IOException; /** * * Interface for specifying what to do with the file resource. * */ public interface FileWriterAction { void writeFile(FileWriter writer) throws IOException; } SimpleFileWriter.java000066400000000000000000000011031264154357600345150ustar00rootroot00000000000000java-design-patterns-1.9.0/execute-around/src/main/java/com/iluwatar/execute/aroundpackage com.iluwatar.execute.around; import java.io.FileWriter; import java.io.IOException; /** * * SimpleFileWriter handles opening and closing file for the user. The user only has to specify what * to do with the file resource through {@link FileWriterAction} parameter. * */ public class SimpleFileWriter { /** * Constructor */ public SimpleFileWriter(String filename, FileWriterAction action) throws IOException { FileWriter writer = new FileWriter(filename); try { action.writeFile(writer); } finally { writer.close(); } } } java-design-patterns-1.9.0/execute-around/src/test/000077500000000000000000000000001264154357600222625ustar00rootroot00000000000000java-design-patterns-1.9.0/execute-around/src/test/java/000077500000000000000000000000001264154357600232035ustar00rootroot00000000000000java-design-patterns-1.9.0/execute-around/src/test/java/com/000077500000000000000000000000001264154357600237615ustar00rootroot00000000000000java-design-patterns-1.9.0/execute-around/src/test/java/com/iluwatar/000077500000000000000000000000001264154357600256115ustar00rootroot00000000000000java-design-patterns-1.9.0/execute-around/src/test/java/com/iluwatar/execute/000077500000000000000000000000001264154357600272535ustar00rootroot00000000000000java-design-patterns-1.9.0/execute-around/src/test/java/com/iluwatar/execute/around/000077500000000000000000000000001264154357600305435ustar00rootroot00000000000000java-design-patterns-1.9.0/execute-around/src/test/java/com/iluwatar/execute/around/AppTest.java000066400000000000000000000006741264154357600327750ustar00rootroot00000000000000package com.iluwatar.execute.around; import org.junit.After; import org.junit.Before; import org.junit.Test; import java.io.File; import java.io.IOException; /** * * Tests execute-around example. * */ public class AppTest { @Test public void test() throws IOException { String[] args = {}; App.main(args); } @Before @After public void cleanup() { File file = new File("testfile.txt"); file.delete(); } } SimpleFileWriterTest.java000066400000000000000000000040151264154357600354150ustar00rootroot00000000000000java-design-patterns-1.9.0/execute-around/src/test/java/com/iluwatar/execute/aroundpackage com.iluwatar.execute.around; import org.junit.Assert; import org.junit.Rule; import org.junit.Test; import org.junit.rules.TemporaryFolder; import java.io.File; import java.io.IOException; import java.nio.file.Files; import static org.junit.Assert.assertFalse; import static org.junit.Assert.assertTrue; /** * Date: 12/12/15 - 3:21 PM * * @author Jeroen Meulemeester */ public class SimpleFileWriterTest { /** * Create a temporary folder, used to generate files in during this test */ @Rule public final TemporaryFolder testFolder = new TemporaryFolder(); /** * Verify if the given writer is not 'null' */ @Test public void testWriterNotNull() throws Exception { final File temporaryFile = this.testFolder.newFile(); new SimpleFileWriter(temporaryFile.getPath(), Assert::assertNotNull); } /** * Test if the {@link SimpleFileWriter} creates a file if it doesn't exist */ @Test public void testNonExistentFile() throws Exception { final File nonExistingFile = new File(this.testFolder.getRoot(), "non-existing-file"); assertFalse(nonExistingFile.exists()); new SimpleFileWriter(nonExistingFile.getPath(), Assert::assertNotNull); assertTrue(nonExistingFile.exists()); } /** * Test if the data written to the file writer actually gets in the file */ @Test public void testActualWrite() throws Exception { final String testMessage = "Test message"; final File temporaryFile = this.testFolder.newFile(); assertTrue(temporaryFile.exists()); new SimpleFileWriter(temporaryFile.getPath(), writer -> writer.write(testMessage)); assertTrue(Files.lines(temporaryFile.toPath()).allMatch(testMessage::equals)); } /** * Verify if an {@link IOException} during the write ripples through */ @Test(expected = IOException.class) public void testIoException() throws Exception { final File temporaryFile = this.testFolder.newFile(); new SimpleFileWriter(temporaryFile.getPath(), writer -> { throw new IOException(""); }); } } java-design-patterns-1.9.0/facade/000077500000000000000000000000001264154357600167675ustar00rootroot00000000000000java-design-patterns-1.9.0/facade/etc/000077500000000000000000000000001264154357600175425ustar00rootroot00000000000000java-design-patterns-1.9.0/facade/etc/facade.png000066400000000000000000001020271264154357600214550ustar00rootroot00000000000000PNG  IHDR8.VIDATx{}X%:!XN{mFGN7嶼y<8XQ0jJX89) -'3zr\ 1؉.Z%ÎFFr_zOϫg^?|1>]uΫZҪ:`PS0jy/ C8;`T2Ŗ]|puӤ:mAD V>8;`B V>8;`B V>8;`B V>8;`B V>8;`B V>8;`B V>8;`B V>8;`ԬzG>Il= & V>8;`L=g}{ $&)*7<ݺS[j# Z}#xHI_g|GSv;ZjvМyU?F W&WW??~ϙ~W+/rnj.Yxm_SyШm\p V>8;`d}雟쓫_ ?83}b'z@o7ZuOx`˟LK7CY;K ({"ץE"?;0zX\>rSIs"vÐ3>h| Lj/j@Ѻijz2èΤR2.B!'{)6rY|Ox6)556421~Υh̳(~$;9.Sz+iLoƬ!O&ś~9~@]-^B|3Gw揨 D] lC. ٨YZ3٣V*ۨG6[<I2Kgb(S͙mFz -]od53<0jCC &3߼7uo⿊y3lr_4uǟFFM1 '4NϷDҏ՗4/q/=o{*¨6w۶CLrN5jiFjZҡܡQʫO,?R7K_ydx7sԧEL_qe%GeOt-NmSal>VMFKMvFmLZb6(2Q=S-oOt^qLyp˳ɒw=N[[3"3Ǐ%ZPQ$^'_s R.{`hmլ2j޲)5ȣ)^%%ܥ|8;`j"jδXZW )`y][FԈ]V'i= GmFMJH\fx@feC`\=ـ>jRz V>8;`jܣ>3Zf -a-oZ?ÁΞ2rS6fxigQ݄Q+J0jBQ+J0jBQ+J0jBQ+J0jBQ+J0jBQ+J0jBQ+J.-scF ZDBEEDt(qw! 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This pattern hides the complexities of the larger system and provides a simpler * interface to the client. It typically involves a single wrapper class which contains a set of * members required by client. These members access the system on behalf of the facade client and * hide the implementation details. *

* In this example the Facade is ({@link DwarvenGoldmineFacade}) and it provides a simpler interface * to the goldmine subsystem. * */ public class App { /** * Program entry point * * @param args command line args */ public static void main(String[] args) { DwarvenGoldmineFacade facade = new DwarvenGoldmineFacade(); facade.startNewDay(); facade.digOutGold(); facade.endDay(); } } java-design-patterns-1.9.0/facade/src/main/java/com/iluwatar/facade/DwarvenCartOperator.java000066400000000000000000000005651264154357600320410ustar00rootroot00000000000000package com.iluwatar.facade; /** * * DwarvenCartOperator is one of the goldmine subsystems. * */ public class DwarvenCartOperator extends DwarvenMineWorker { @Override public void work() { System.out.println(name() + " moves gold chunks out of the mine."); } @Override public String name() { return "Dwarf cart operator"; } } java-design-patterns-1.9.0/facade/src/main/java/com/iluwatar/facade/DwarvenGoldDigger.java000066400000000000000000000005331264154357600314360ustar00rootroot00000000000000package com.iluwatar.facade; /** * * DwarvenGoldDigger is one of the goldmine subsystems. * */ public class DwarvenGoldDigger extends DwarvenMineWorker { @Override public void work() { System.out.println(name() + " digs for gold."); } @Override public String name() { return "Dwarf gold digger"; } } java-design-patterns-1.9.0/facade/src/main/java/com/iluwatar/facade/DwarvenGoldmineFacade.java000066400000000000000000000023611264154357600322520ustar00rootroot00000000000000package com.iluwatar.facade; import java.util.ArrayList; import java.util.Collection; import java.util.List; /** * * DwarvenGoldmineFacade provides a single interface through which users can operate the subsystems. * * This makes the goldmine easier to operate and cuts the dependencies from the goldmine user to the * subsystems. * */ public class DwarvenGoldmineFacade { private final List workers; /** * Constructor */ public DwarvenGoldmineFacade() { workers = new ArrayList<>(); workers.add(new DwarvenGoldDigger()); workers.add(new DwarvenCartOperator()); workers.add(new DwarvenTunnelDigger()); } public void startNewDay() { makeActions(workers, DwarvenMineWorker.Action.WAKE_UP, DwarvenMineWorker.Action.GO_TO_MINE); } public void digOutGold() { makeActions(workers, DwarvenMineWorker.Action.WORK); } public void endDay() { makeActions(workers, DwarvenMineWorker.Action.GO_HOME, DwarvenMineWorker.Action.GO_TO_SLEEP); } private void makeActions(Collection workers, DwarvenMineWorker.Action... actions) { for (DwarvenMineWorker worker : workers) { worker.action(actions); } } } java-design-patterns-1.9.0/facade/src/main/java/com/iluwatar/facade/DwarvenMineWorker.java000066400000000000000000000023411264154357600315100ustar00rootroot00000000000000package com.iluwatar.facade; /** * * DwarvenMineWorker is one of the goldmine subsystems. * */ public abstract class DwarvenMineWorker { public void goToSleep() { System.out.println(name() + " goes to sleep."); } public void wakeUp() { System.out.println(name() + " wakes up."); } public void goHome() { System.out.println(name() + " goes home."); } public void goToMine() { System.out.println(name() + " goes to the mine."); } private void action(Action action) { switch (action) { case GO_TO_SLEEP: goToSleep(); break; case WAKE_UP: wakeUp(); break; case GO_HOME: goHome(); break; case GO_TO_MINE: goToMine(); break; case WORK: work(); break; default: System.out.println("Undefined action"); break; } } /** * Perform actions */ public void action(Action... actions) { for (Action action : actions) { action(action); } } public abstract void work(); public abstract String name(); static enum Action { GO_TO_SLEEP, WAKE_UP, GO_HOME, GO_TO_MINE, WORK } } java-design-patterns-1.9.0/facade/src/main/java/com/iluwatar/facade/DwarvenTunnelDigger.java000066400000000000000000000005661264154357600320240ustar00rootroot00000000000000package com.iluwatar.facade; /** * * DwarvenTunnelDigger is one of the goldmine subsystems. * */ public class DwarvenTunnelDigger extends DwarvenMineWorker { @Override public void work() { System.out.println(name() + " creates another promising tunnel."); } @Override public String name() { return "Dwarven tunnel digger"; } } java-design-patterns-1.9.0/facade/src/test/000077500000000000000000000000001264154357600205355ustar00rootroot00000000000000java-design-patterns-1.9.0/facade/src/test/java/000077500000000000000000000000001264154357600214565ustar00rootroot00000000000000java-design-patterns-1.9.0/facade/src/test/java/com/000077500000000000000000000000001264154357600222345ustar00rootroot00000000000000java-design-patterns-1.9.0/facade/src/test/java/com/iluwatar/000077500000000000000000000000001264154357600240645ustar00rootroot00000000000000java-design-patterns-1.9.0/facade/src/test/java/com/iluwatar/facade/000077500000000000000000000000001264154357600252675ustar00rootroot00000000000000java-design-patterns-1.9.0/facade/src/test/java/com/iluwatar/facade/AppTest.java000066400000000000000000000003021264154357600275050ustar00rootroot00000000000000package com.iluwatar.facade; import org.junit.Test; /** * * Application test * */ public class AppTest { @Test public void test() { String[] args = {}; App.main(args); } } java-design-patterns-1.9.0/facade/src/test/java/com/iluwatar/facade/DwarvenGoldmineFacadeTest.java000066400000000000000000000075221264154357600331510ustar00rootroot00000000000000package com.iluwatar.facade; import org.junit.After; import org.junit.Before; import org.junit.Test; import java.io.PrintStream; import static org.mockito.Matchers.eq; import static org.mockito.Mockito.mock; import static org.mockito.Mockito.verify; import static org.mockito.Mockito.verifyNoMoreInteractions; import static org.mockito.internal.verification.VerificationModeFactory.times; /** * Date: 12/9/15 - 9:40 PM * * @author Jeroen Meulemeester */ public class DwarvenGoldmineFacadeTest { /** * The mocked standard out {@link PrintStream}, required since the actions on the gold mine facade * don't have any influence on any other accessible objects, except for writing to std-out using * {@link System#out} */ private final PrintStream stdOutMock = mock(PrintStream.class); /** * Keep the original std-out so it can be restored after the test */ private final PrintStream stdOutOrig = System.out; /** * Inject the mocked std-out {@link PrintStream} into the {@link System} class before each test */ @Before public void setUp() { System.setOut(this.stdOutMock); } /** * Removed the mocked std-out {@link PrintStream} again from the {@link System} class */ @After public void tearDown() { System.setOut(this.stdOutOrig); } /** * Test a complete day cycle in the gold mine by executing all three different steps: {@link * DwarvenGoldmineFacade#startNewDay()}, {@link DwarvenGoldmineFacade#digOutGold()} and {@link * DwarvenGoldmineFacade#endDay()}. * * See if the workers are doing what's expected from them on each step. */ @Test public void testFullWorkDay() { final DwarvenGoldmineFacade goldMine = new DwarvenGoldmineFacade(); goldMine.startNewDay(); // On the start of a day, all workers should wake up ... verify(this.stdOutMock, times(1)).println(eq("Dwarf gold digger wakes up.")); verify(this.stdOutMock, times(1)).println(eq("Dwarf cart operator wakes up.")); verify(this.stdOutMock, times(1)).println(eq("Dwarven tunnel digger wakes up.")); // ... and go to the mine verify(this.stdOutMock, times(1)).println(eq("Dwarf gold digger goes to the mine.")); verify(this.stdOutMock, times(1)).println(eq("Dwarf cart operator goes to the mine.")); verify(this.stdOutMock, times(1)).println(eq("Dwarven tunnel digger goes to the mine.")); // No other actions were invoked, so the workers shouldn't have done (printed) anything else verifyNoMoreInteractions(this.stdOutMock); // Now do some actual work, start digging gold! goldMine.digOutGold(); // Since we gave the dig command, every worker should be doing it's job ... verify(this.stdOutMock, times(1)).println(eq("Dwarf gold digger digs for gold.")); verify(this.stdOutMock, times(1)).println(eq("Dwarf cart operator moves gold chunks out of the mine.")); verify(this.stdOutMock, times(1)).println(eq("Dwarven tunnel digger creates another promising tunnel.")); // Again, they shouldn't be doing anything else. verifyNoMoreInteractions(this.stdOutMock); // Enough gold, lets end the day. goldMine.endDay(); // Check if the workers go home ... verify(this.stdOutMock, times(1)).println(eq("Dwarf gold digger goes home.")); verify(this.stdOutMock, times(1)).println(eq("Dwarf cart operator goes home.")); verify(this.stdOutMock, times(1)).println(eq("Dwarven tunnel digger goes home.")); // ... and go to sleep. 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Factory Method lets a class defer instantiation to subclasses. ![alt text](./etc/factory-method_1.png "Factory Method") **Applicability:** Use the Factory Method pattern when * a class can't anticipate the class of objects it must create * a class wants its subclasses to specify the objects it creates * classes delegate responsibility to one of several helper subclasses, and you want to localize the knowledge of which helper subclass is the delegate **Credits** * [Design Patterns: Elements of Reusable Object-Oriented Software](http://www.amazon.com/Design-Patterns-Elements-Reusable-Object-Oriented/dp/0201633612) java-design-patterns-1.9.0/factory-method/pom.xml000066400000000000000000000013751264154357600220340ustar00rootroot00000000000000 4.0.0 com.iluwatar java-design-patterns 1.9.0 factory-method junit junit test org.mockito mockito-core test java-design-patterns-1.9.0/factory-method/src/000077500000000000000000000000001264154357600213005ustar00rootroot00000000000000java-design-patterns-1.9.0/factory-method/src/main/000077500000000000000000000000001264154357600222245ustar00rootroot00000000000000java-design-patterns-1.9.0/factory-method/src/main/java/000077500000000000000000000000001264154357600231455ustar00rootroot00000000000000java-design-patterns-1.9.0/factory-method/src/main/java/com/000077500000000000000000000000001264154357600237235ustar00rootroot00000000000000java-design-patterns-1.9.0/factory-method/src/main/java/com/iluwatar/000077500000000000000000000000001264154357600255535ustar00rootroot00000000000000java-design-patterns-1.9.0/factory-method/src/main/java/com/iluwatar/factory/000077500000000000000000000000001264154357600272225ustar00rootroot00000000000000java-design-patterns-1.9.0/factory-method/src/main/java/com/iluwatar/factory/method/000077500000000000000000000000001264154357600305025ustar00rootroot00000000000000java-design-patterns-1.9.0/factory-method/src/main/java/com/iluwatar/factory/method/App.java000066400000000000000000000026521264154357600320720ustar00rootroot00000000000000package com.iluwatar.factory.method; /** * * The Factory Method is a creational design pattern which uses factory methods to deal with the * problem of creating objects without specifying the exact class of object that will be created. * This is done by creating objects via calling a factory method either specified in an interface * and implemented by child classes, or implemented in a base class and optionally overridden by * derived classes—rather than by calling a constructor. *

* In this Factory Method example we have an interface ({@link Blacksmith}) with a method for * creating objects ({@link Blacksmith#manufactureWeapon}). The concrete subclasses ( * {@link OrcBlacksmith}, {@link ElfBlacksmith}) then override the method to produce objects of * their liking. * */ public class App { /** * Program entry point * * @param args command line args */ public static void main(String[] args) { Blacksmith blacksmith; Weapon weapon; blacksmith = new OrcBlacksmith(); weapon = blacksmith.manufactureWeapon(WeaponType.SPEAR); System.out.println(weapon); weapon = blacksmith.manufactureWeapon(WeaponType.AXE); System.out.println(weapon); blacksmith = new ElfBlacksmith(); weapon = blacksmith.manufactureWeapon(WeaponType.SHORT_SWORD); System.out.println(weapon); weapon = blacksmith.manufactureWeapon(WeaponType.SPEAR); System.out.println(weapon); } } java-design-patterns-1.9.0/factory-method/src/main/java/com/iluwatar/factory/method/Blacksmith.java000066400000000000000000000003051264154357600334240ustar00rootroot00000000000000package com.iluwatar.factory.method; /** * * The interface containing method for producing objects. * */ public interface Blacksmith { Weapon manufactureWeapon(WeaponType weaponType); } ElfBlacksmith.java000066400000000000000000000004011264154357600337710ustar00rootroot00000000000000java-design-patterns-1.9.0/factory-method/src/main/java/com/iluwatar/factory/methodpackage com.iluwatar.factory.method; /** * * Concrete subclass for creating new objects. * */ public class ElfBlacksmith implements Blacksmith { public Weapon manufactureWeapon(WeaponType weaponType) { return new ElfWeapon(weaponType); } } java-design-patterns-1.9.0/factory-method/src/main/java/com/iluwatar/factory/method/ElfWeapon.java000066400000000000000000000005741264154357600332330ustar00rootroot00000000000000package com.iluwatar.factory.method; /** * ElfWeapon. */ public class ElfWeapon implements Weapon { private WeaponType weaponType; public ElfWeapon(WeaponType weaponType) { this.weaponType = weaponType; } @Override public String toString() { return "Elven " + weaponType; } @Override public WeaponType getWeaponType() { return weaponType; } } OrcBlacksmith.java000066400000000000000000000004001264154357600340050ustar00rootroot00000000000000java-design-patterns-1.9.0/factory-method/src/main/java/com/iluwatar/factory/methodpackage com.iluwatar.factory.method; /** * * Concrete subclass for creating new objects. * */ public class OrcBlacksmith implements Blacksmith { public Weapon manufactureWeapon(WeaponType weaponType) { return new OrcWeapon(weaponType); } } java-design-patterns-1.9.0/factory-method/src/main/java/com/iluwatar/factory/method/OrcWeapon.java000066400000000000000000000005751264154357600332510ustar00rootroot00000000000000package com.iluwatar.factory.method; /** * OrcWeapon. */ public class OrcWeapon implements Weapon { private WeaponType weaponType; public OrcWeapon(WeaponType weaponType) { this.weaponType = weaponType; } @Override public String toString() { return "Orcish " + weaponType; } @Override public WeaponType getWeaponType() { return weaponType; } } java-design-patterns-1.9.0/factory-method/src/main/java/com/iluwatar/factory/method/Weapon.java000066400000000000000000000001771264154357600326030ustar00rootroot00000000000000package com.iluwatar.factory.method; /** * Weapon interface. */ public interface Weapon { WeaponType getWeaponType(); } java-design-patterns-1.9.0/factory-method/src/main/java/com/iluwatar/factory/method/WeaponType.java000066400000000000000000000005071264154357600334420ustar00rootroot00000000000000package com.iluwatar.factory.method; /** * * WeaponType enumeration * */ public enum WeaponType { SHORT_SWORD("short sword"), SPEAR("spear"), AXE("axe"), UNDEFINED(""); private String title; WeaponType(String title) { this.title = title; } @Override public String toString() { return title; } } java-design-patterns-1.9.0/factory-method/src/test/000077500000000000000000000000001264154357600222575ustar00rootroot00000000000000java-design-patterns-1.9.0/factory-method/src/test/java/000077500000000000000000000000001264154357600232005ustar00rootroot00000000000000java-design-patterns-1.9.0/factory-method/src/test/java/com/000077500000000000000000000000001264154357600237565ustar00rootroot00000000000000java-design-patterns-1.9.0/factory-method/src/test/java/com/iluwatar/000077500000000000000000000000001264154357600256065ustar00rootroot00000000000000java-design-patterns-1.9.0/factory-method/src/test/java/com/iluwatar/factory/000077500000000000000000000000001264154357600272555ustar00rootroot00000000000000java-design-patterns-1.9.0/factory-method/src/test/java/com/iluwatar/factory/method/000077500000000000000000000000001264154357600305355ustar00rootroot00000000000000FactoryMethodTest.java000066400000000000000000000056311264154357600347360ustar00rootroot00000000000000java-design-patterns-1.9.0/factory-method/src/test/java/com/iluwatar/factory/methodpackage com.iluwatar.factory.method; import static org.junit.Assert.assertEquals; import static org.junit.Assert.assertTrue; import org.junit.Test; /** * The Factory Method is a creational design pattern which uses factory methods to deal with the * problem of creating objects without specifying the exact class of object that will be created. * This is done by creating objects via calling a factory method either specified in an interface * and implemented by child classes, or implemented in a base class and optionally overridden by * derived classes—rather than by calling a constructor. * *

Factory produces the object of its liking. * The weapon {@link Weapon} manufactured by the * blacksmith depends on the kind of factory implementation it is referring to. *

*/ public class FactoryMethodTest { /** * Testing {@link OrcBlacksmith} to produce a SPEAR asserting that the Weapon is an instance * of {@link OrcWeapon}. */ @Test public void testOrcBlacksmithWithSpear() { Blacksmith blacksmith = new OrcBlacksmith(); Weapon weapon = blacksmith.manufactureWeapon(WeaponType.SPEAR); verifyWeapon(weapon, WeaponType.SPEAR, OrcWeapon.class); } /** * Testing {@link OrcBlacksmith} to produce a AXE asserting that the Weapon is an instance * of {@link OrcWeapon}. */ @Test public void testOrcBlacksmithWithAxe() { Blacksmith blacksmith = new OrcBlacksmith(); Weapon weapon = blacksmith.manufactureWeapon(WeaponType.AXE); verifyWeapon(weapon, WeaponType.AXE, OrcWeapon.class); } /** * Testing {@link ElfBlacksmith} to produce a SHORT_SWORD asserting that the Weapon is an * instance of {@link ElfWeapon}. */ @Test public void testElfBlacksmithWithShortSword() { Blacksmith blacksmith = new ElfBlacksmith(); Weapon weapon = blacksmith.manufactureWeapon(WeaponType.SHORT_SWORD); verifyWeapon(weapon, WeaponType.SHORT_SWORD, ElfWeapon.class); } /** * Testing {@link ElfBlacksmith} to produce a SPEAR asserting that the Weapon is an instance * of {@link ElfWeapon}. */ @Test public void testElfBlacksmithWithSpear() { Blacksmith blacksmith = new ElfBlacksmith(); Weapon weapon = blacksmith.manufactureWeapon(WeaponType.SPEAR); verifyWeapon(weapon, WeaponType.SPEAR, ElfWeapon.class); } /** * This method asserts that the weapon object that is passed is an instance of the clazz and the * weapon is of type expectedWeaponType. * * @param weapon weapon object which is to be verified * @param expectedWeaponType expected WeaponType of the weapon * @param clazz expected class of the weapon */ private void verifyWeapon(Weapon weapon, WeaponType expectedWeaponType, Class clazz) { assertTrue("Weapon must be an object of: " + clazz.getName(), clazz.isInstance(weapon)); assertEquals("Weapon must be of weaponType: " + clazz.getName(), expectedWeaponType, weapon.getWeaponType()); } } java-design-patterns-1.9.0/faq.md000066400000000000000000000060621264154357600166610ustar00rootroot00000000000000--- layout: page title: FAQ permalink: /faq/ icon: fa-question page-index: 1 --- ### Q1: What is the difference between State and Strategy patterns? {#Q1} While the implementation is similar they solve different problems. The State pattern deals with what state an object is in - it encapsulates state-dependent behavior. The Strategy pattern deals with how an object performs a certain task - it encapsulates an algorithm. ### Q2: What is the difference between Strategy and Template Method patterns? {#Q2} In Template Method the algorithm is chosen at compile time via inheritance. With Strategy pattern the algorithm is chosen at runtime via composition. ### Q3: What is the difference between Proxy and Decorator patterns? {#Q3} The difference is the intent of the patterns. While Proxy controls access to the object Decorator is used to add responsibilities to the object. ### Q4: What is the difference between Chain of Responsibility and Intercepting Filter patterns? {#Q4} While the implementations look similar there are differences. The Chain of Responsibility forms a chain of request processors and the processors are then executed one by one until the correct processor is found. In Intercepting Filter the chain is constructed from filters and the whole chain is always executed. ### Q5: What is the difference between Visitor and Double Dispatch patterns? {#Q5} The Visitor pattern is a means of adding a new operation to existing classes. Double dispatch is a means of dispatching function calls with respect to two polymorphic types, rather than a single polymorphic type, which is what languages like C++ and Java _do not_ support directly. ### Q6: What are the differences between Flyweight and Object Pool patterns? {#Q6} They differ in the way they are used. Pooled objects can simultaneously be used by a single "client" only. For that, a pooled object must be checked out from the pool, then it can be used by a client, and then the client must return the object back to the pool. Multiple instances of identical objects may exist, up to the maximal capacity of the pool. In contrast, a Flyweight object is singleton, and it can be used simultaneously by multiple clients. As for concurrent access, pooled objects can be mutable and they usually don't need to be thread safe, as typically, only one thread is going to use a specific instance at the same time. Flyweight must either be immutable (the best option), or implement thread safety. As for performance and scalability, pools can become bottlenecks, if all the pooled objects are in use and more clients need them, threads will become blocked waiting for available object from the pool. This is not the case with Flyweight. ### Q7: What are the differences between FluentInterface and Builder patterns? {#Q7} Fluent interfaces are sometimes confused with the Builder pattern, because they share method chaining and a fluent usage. 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Using this pattern results in code that can be read nearly as human language. **Implementation:** A fluent interface can be implemented using any of * Method Chaining - calling a method returns some object on which further methods can be called. * Static Factory Methods and Imports * Named parameters - can be simulated in Java using static factory methods. ![Fluent Interface](./etc/fluentinterface.png "Fluent Interface") **Applicability:** Use the Fluent Interface pattern when * you provide an API that would benefit from a DSL-like usage * you have objects that are difficult to configure or use **Real world examples:** * [Java 8 Stream API](http://www.oracle.com/technetwork/articles/java/ma14-java-se-8-streams-2177646.html) * [Google Guava FluentInterable](https://github.com/google/guava/wiki/FunctionalExplained) * [JOOQ](http://www.jooq.org/doc/3.0/manual/getting-started/use-cases/jooq-as-a-standalone-sql-builder/) * [Mockito](http://mockito.org/) * [Java Hamcrest](http://code.google.com/p/hamcrest/wiki/Tutorial) **Credits** * [Fluent Interface - Martin Fowler](http://www.martinfowler.com/bliki/FluentInterface.html) * [Evolutionary architecture and emergent design: Fluent interfaces - Neal Ford](http://www.ibm.com/developerworks/library/j-eaed14/) * [Internal DSL](http://www.infoq.com/articles/internal-dsls-java) java-design-patterns-1.9.0/fluentinterface/pom.xml000066400000000000000000000015511264154357600222610ustar00rootroot00000000000000 java-design-patterns com.iluwatar 1.9.0 4.0.0 fluentinterface junit junit test org.mockito mockito-core test java-design-patterns-1.9.0/fluentinterface/src/000077500000000000000000000000001264154357600215315ustar00rootroot00000000000000java-design-patterns-1.9.0/fluentinterface/src/main/000077500000000000000000000000001264154357600224555ustar00rootroot00000000000000java-design-patterns-1.9.0/fluentinterface/src/main/java/000077500000000000000000000000001264154357600233765ustar00rootroot00000000000000java-design-patterns-1.9.0/fluentinterface/src/main/java/com/000077500000000000000000000000001264154357600241545ustar00rootroot00000000000000java-design-patterns-1.9.0/fluentinterface/src/main/java/com/iluwatar/000077500000000000000000000000001264154357600260045ustar00rootroot00000000000000java-design-patterns-1.9.0/fluentinterface/src/main/java/com/iluwatar/fluentinterface/000077500000000000000000000000001264154357600311625ustar00rootroot00000000000000java-design-patterns-1.9.0/fluentinterface/src/main/java/com/iluwatar/fluentinterface/app/000077500000000000000000000000001264154357600317425ustar00rootroot00000000000000java-design-patterns-1.9.0/fluentinterface/src/main/java/com/iluwatar/fluentinterface/app/App.java000066400000000000000000000074521264154357600333350ustar00rootroot00000000000000package com.iluwatar.fluentinterface.app; import static java.lang.String.valueOf; import java.util.ArrayList; import java.util.Arrays; import java.util.Iterator; import java.util.List; import java.util.StringJoiner; import java.util.function.Function; import java.util.function.Predicate; import com.iluwatar.fluentinterface.fluentiterable.FluentIterable; import com.iluwatar.fluentinterface.fluentiterable.lazy.LazyFluentIterable; import com.iluwatar.fluentinterface.fluentiterable.simple.SimpleFluentIterable; /** * The Fluent Interface pattern is useful when you want to provide an easy readable, flowing API. * Those interfaces tend to mimic domain specific languages, so they can nearly be read as human * languages. *

* In this example two implementations of a {@link FluentIterable} interface are given. The * {@link SimpleFluentIterable} evaluates eagerly and would be too costly for real world * applications. The {@link LazyFluentIterable} is evaluated on termination. Their usage is * demonstrated with a simple number list that is filtered, transformed and collected. The result is * printed afterwards. * */ public class App { /** * Program entry point */ public static void main(String[] args) { List integerList = new ArrayList<>(); integerList.addAll(Arrays.asList(1, -61, 14, -22, 18, -87, 6, 64, -82, 26, -98, 97, 45, 23, 2, -68, 45)); prettyPrint("The initial list contains: ", integerList); List firstFiveNegatives = SimpleFluentIterable.fromCopyOf(integerList).filter(negatives()).first(3).asList(); prettyPrint("The first three negative values are: ", firstFiveNegatives); List lastTwoPositives = SimpleFluentIterable.fromCopyOf(integerList).filter(positives()).last(2).asList(); prettyPrint("The last two positive values are: ", lastTwoPositives); SimpleFluentIterable .fromCopyOf(integerList) .filter(number -> number % 2 == 0) .first() .ifPresent( evenNumber -> System.out.println(String.format("The first even number is: %d", evenNumber))); List transformedList = SimpleFluentIterable.fromCopyOf(integerList).filter(negatives()).map(transformToString()) .asList(); prettyPrint("A string-mapped list of negative numbers contains: ", transformedList); List lastTwoOfFirstFourStringMapped = LazyFluentIterable.from(integerList).filter(positives()).first(4).last(2) .map(number -> "String[" + valueOf(number) + "]").asList(); prettyPrint( "The lazy list contains the last two of the first four positive numbers mapped to Strings: ", lastTwoOfFirstFourStringMapped); LazyFluentIterable .from(integerList) .filter(negatives()) .first(2) .last() .ifPresent( lastOfFirstTwo -> System.out.println(String.format( "The last of the first two negatives is: %d", lastOfFirstTwo))); } private static Function transformToString() { return integer -> "String[" + valueOf(integer) + "]"; } private static Predicate negatives() { return integer -> integer < 0; } private static Predicate positives() { return integer -> integer > 0; } private static void prettyPrint(String prefix, Iterable iterable) { prettyPrint(", ", prefix, iterable); } private static void prettyPrint(String delimiter, String prefix, Iterable iterable) { StringJoiner joiner = new StringJoiner(delimiter, prefix, "."); Iterator iterator = iterable.iterator(); while (iterator.hasNext()) { joiner.add(iterator.next().toString()); } System.out.println(joiner); } } fluentiterable/000077500000000000000000000000001264154357600341105ustar00rootroot00000000000000java-design-patterns-1.9.0/fluentinterface/src/main/java/com/iluwatar/fluentinterfaceFluentIterable.java000066400000000000000000000055421264154357600376660ustar00rootroot00000000000000java-design-patterns-1.9.0/fluentinterface/src/main/java/com/iluwatar/fluentinterface/fluentiterablepackage com.iluwatar.fluentinterface.fluentiterable; import java.util.ArrayList; import java.util.Iterator; import java.util.List; import java.util.Optional; import java.util.function.Function; import java.util.function.Predicate; /** * The FluentIterable is a more convenient implementation of the common iterable interface based on * the fluent interface design pattern. This interface defines common operations, but doesn't aim to * be complete. It was inspired by Guava's com.google.common.collect.FluentIterable. * * @param is the class of objects the iterable contains */ public interface FluentIterable extends Iterable { /** * Filters the contents of Iterable using the given predicate, leaving only the ones which satisfy * the predicate. * * @param predicate the condition to test with for the filtering. If the test is negative, the * tested object is removed by the iterator. * @return a filtered FluentIterable */ FluentIterable filter(Predicate predicate); /** * Returns an Optional containing the first element of this iterable if present, else returns * Optional.empty(). * * @return the first element after the iteration is evaluated */ Optional first(); /** * Evaluates the iteration and leaves only the count first elements. * * @return the first count elements as an Iterable */ FluentIterable first(int count); /** * Evaluates the iteration and returns the last element. This is a terminating operation. * * @return the last element after the iteration is evaluated */ Optional last(); /** * Evaluates the iteration and leaves only the count last elements. * * @return the last counts elements as an Iterable */ FluentIterable last(int count); /** * Transforms this FluentIterable into a new one containing objects of the type NEW_TYPE. * * @param function a function that transforms an instance of TYPE into an instance of NEW_TYPE * @param the target type of the transformation * @return a new FluentIterable of the new type */ FluentIterable map(Function function); /** * Returns the contents of this Iterable as a List. * * @return a List representation of this Iterable */ List asList(); /** * Utility method that iterates over iterable and adds the contents to a list. * * @param iterable the iterable to collect * @param the type of the objects to iterate * @return a list with all objects of the given iterator */ static List copyToList(Iterable iterable) { ArrayList copy = new ArrayList<>(); Iterator iterator = iterable.iterator(); while (iterator.hasNext()) { copy.add(iterator.next()); } return copy; } } lazy/000077500000000000000000000000001264154357600350675ustar00rootroot00000000000000java-design-patterns-1.9.0/fluentinterface/src/main/java/com/iluwatar/fluentinterface/fluentiterableDecoratingIterator.java000066400000000000000000000026121264154357600415240ustar00rootroot00000000000000java-design-patterns-1.9.0/fluentinterface/src/main/java/com/iluwatar/fluentinterface/fluentiterable/lazypackage com.iluwatar.fluentinterface.fluentiterable.lazy; import java.util.Iterator; /** * This class is used to realize LazyFluentIterables. It decorates a given iterator. Does not * support consecutive hasNext() calls. */ public abstract class DecoratingIterator implements Iterator { protected final Iterator fromIterator; private TYPE next = null; /** * Creates an iterator that decorates the given iterator. */ public DecoratingIterator(Iterator fromIterator) { this.fromIterator = fromIterator; } /** * Precomputes and saves the next element of the Iterable. null is considered as end of data. * * @return true if a next element is available */ @Override public final boolean hasNext() { next = computeNext(); return next != null; } /** * Returns the next element of the Iterable. * * @return the next element of the Iterable, or null if not present. */ @Override public final TYPE next() { if (next == null) { return fromIterator.next(); } else { final TYPE result = next; next = null; return result; } } /** * Computes the next object of the Iterable. Can be implemented to realize custom behaviour for an * iteration process. null is considered as end of data. * * @return the next element of the Iterable. */ public abstract TYPE computeNext(); } LazyFluentIterable.java000066400000000000000000000155601264154357600415060ustar00rootroot00000000000000java-design-patterns-1.9.0/fluentinterface/src/main/java/com/iluwatar/fluentinterface/fluentiterable/lazypackage com.iluwatar.fluentinterface.fluentiterable.lazy; import java.util.ArrayList; import java.util.Iterator; import java.util.List; import java.util.Optional; import java.util.function.Function; import java.util.function.Predicate; import com.iluwatar.fluentinterface.fluentiterable.FluentIterable; /** * This is a lazy implementation of the FluentIterable interface. It evaluates all chained * operations when a terminating operation is applied. * * @param the type of the objects the iteration is about */ public class LazyFluentIterable implements FluentIterable { private final Iterable iterable; /** * This constructor creates a new LazyFluentIterable. It wraps the given iterable. * * @param iterable the iterable this FluentIterable works on. */ protected LazyFluentIterable(Iterable iterable) { this.iterable = iterable; } /** * This constructor can be used to implement anonymous subclasses of the LazyFluentIterable. */ protected LazyFluentIterable() { iterable = this; } /** * Filters the contents of Iterable using the given predicate, leaving only the ones which satisfy * the predicate. * * @param predicate the condition to test with for the filtering. If the test is negative, the * tested object is removed by the iterator. * @return a new FluentIterable object that decorates the source iterable */ @Override public FluentIterable filter(Predicate predicate) { return new LazyFluentIterable() { @Override public Iterator iterator() { return new DecoratingIterator(iterable.iterator()) { @Override public TYPE computeNext() { while (fromIterator.hasNext()) { TYPE candidate = fromIterator.next(); if (predicate.test(candidate)) { return candidate; } } return null; } }; } }; } /** * Can be used to collect objects from the iteration. Is a terminating operation. * * @return an Optional containing the first object of this Iterable */ @Override public Optional first() { Iterator resultIterator = first(1).iterator(); return resultIterator.hasNext() ? Optional.of(resultIterator.next()) : Optional.empty(); } /** * Can be used to collect objects from the iteration. * * @param count defines the number of objects to return * @return the same FluentIterable with a collection decimated to a maximum of 'count' first * objects. */ @Override public FluentIterable first(int count) { return new LazyFluentIterable() { @Override public Iterator iterator() { return new DecoratingIterator(iterable.iterator()) { int currentIndex = 0; @Override public TYPE computeNext() { if (currentIndex < count && fromIterator.hasNext()) { TYPE candidate = fromIterator.next(); currentIndex++; return candidate; } return null; } }; } }; } /** * Can be used to collect objects from the iteration. Is a terminating operation. * * @return an Optional containing the last object of this Iterable */ @Override public Optional last() { Iterator resultIterator = last(1).iterator(); return resultIterator.hasNext() ? Optional.of(resultIterator.next()) : Optional.empty(); } /** * Can be used to collect objects from the Iterable. Is a terminating operation. This operation is * memory intensive, because the contents of this Iterable are collected into a List, when the * next object is requested. * * @param count defines the number of objects to return * @return the same FluentIterable with a collection decimated to a maximum of 'count' last * objects */ @Override public FluentIterable last(int count) { return new LazyFluentIterable() { @Override public Iterator iterator() { return new DecoratingIterator(iterable.iterator()) { private int stopIndex; private int totalElementsCount; private List list; private int currentIndex = 0; @Override public TYPE computeNext() { initialize(); TYPE candidate = null; while (currentIndex < stopIndex && fromIterator.hasNext()) { currentIndex++; fromIterator.next(); } if (currentIndex >= stopIndex && fromIterator.hasNext()) { candidate = fromIterator.next(); } return candidate; } private void initialize() { if (list == null) { list = new ArrayList<>(); Iterator newIterator = iterable.iterator(); while (newIterator.hasNext()) { list.add(newIterator.next()); } totalElementsCount = list.size(); stopIndex = totalElementsCount - count; } } }; } }; } /** * Transforms this FluentIterable into a new one containing objects of the type NEW_TYPE. * * @param function a function that transforms an instance of TYPE into an instance of NEW_TYPE * @param the target type of the transformation * @return a new FluentIterable of the new type */ @Override public FluentIterable map(Function function) { return new LazyFluentIterable() { @Override public Iterator iterator() { return new DecoratingIterator(null) { Iterator oldTypeIterator = iterable.iterator(); @Override public NEW_TYPE computeNext() { if (oldTypeIterator.hasNext()) { TYPE candidate = oldTypeIterator.next(); return function.apply(candidate); } else { return null; } } }; } }; } /** * Collects all remaining objects of this iteration into a list. * * @return a list with all remaining objects of this iteration */ @Override public List asList() { List copy = FluentIterable.copyToList(iterable); return copy; } @Override public Iterator iterator() { return new DecoratingIterator(iterable.iterator()) { @Override public TYPE computeNext() { return fromIterator.hasNext() ? fromIterator.next() : null; } }; } /** * @return a FluentIterable from a given iterable. Calls the LazyFluentIterable constructor. */ public static final FluentIterable from(Iterable iterable) { return new LazyFluentIterable<>(iterable); } } simple/000077500000000000000000000000001264154357600354015ustar00rootroot00000000000000java-design-patterns-1.9.0/fluentinterface/src/main/java/com/iluwatar/fluentinterface/fluentiterableSimpleFluentIterable.java000066400000000000000000000134351264154357600423310ustar00rootroot00000000000000java-design-patterns-1.9.0/fluentinterface/src/main/java/com/iluwatar/fluentinterface/fluentiterable/simplepackage com.iluwatar.fluentinterface.fluentiterable.simple; import java.util.ArrayList; import java.util.Iterator; import java.util.List; import java.util.Optional; import java.util.Spliterator; import java.util.function.Consumer; import java.util.function.Function; import java.util.function.Predicate; import com.iluwatar.fluentinterface.fluentiterable.FluentIterable; /** * This is a simple implementation of the FluentIterable interface. It evaluates all chained * operations eagerly. This implementation would be costly to be utilized in real applications. * * @param the type of the objects the iteration is about */ public class SimpleFluentIterable implements FluentIterable { private final Iterable iterable; /** * This constructor creates a copy of a given iterable's contents. * * @param iterable the iterable this interface copies to work on. */ protected SimpleFluentIterable(Iterable iterable) { this.iterable = iterable; } /** * Filters the contents of Iterable using the given predicate, leaving only the ones which satisfy * the predicate. * * @param predicate the condition to test with for the filtering. If the test is negative, the * tested object is removed by the iterator. * @return the same FluentIterable with a filtered collection */ @Override public final FluentIterable filter(Predicate predicate) { Iterator iterator = iterator(); while (iterator.hasNext()) { TYPE nextElement = iterator.next(); if (!predicate.test(nextElement)) { iterator.remove(); } } return this; } /** * Can be used to collect objects from the Iterable. Is a terminating operation. * * @return an option of the first object of the Iterable */ @Override public final Optional first() { Iterator resultIterator = first(1).iterator(); return resultIterator.hasNext() ? Optional.of(resultIterator.next()) : Optional.empty(); } /** * Can be used to collect objects from the Iterable. Is a terminating operation. * * @param count defines the number of objects to return * @return the same FluentIterable with a collection decimated to a maximum of 'count' first * objects. */ @Override public final FluentIterable first(int count) { Iterator iterator = iterator(); int currentCount = 0; while (iterator.hasNext()) { iterator.next(); if (currentCount >= count) { iterator.remove(); } currentCount++; } return this; } /** * Can be used to collect objects from the Iterable. Is a terminating operation. * * @return an option of the last object of the Iterable */ @Override public final Optional last() { List list = last(1).asList(); if (list.isEmpty()) { return Optional.empty(); } return Optional.of(list.get(0)); } /** * Can be used to collect objects from the Iterable. Is a terminating operation. * * @param count defines the number of objects to return * @return the same FluentIterable with a collection decimated to a maximum of 'count' last * objects */ @Override public final FluentIterable last(int count) { int remainingElementsCount = getRemainingElementsCount(); Iterator iterator = iterator(); int currentIndex = 0; while (iterator.hasNext()) { iterator.next(); if (currentIndex < remainingElementsCount - count) { iterator.remove(); } currentIndex++; } return this; } /** * Transforms this FluentIterable into a new one containing objects of the type NEW_TYPE. * * @param function a function that transforms an instance of TYPE into an instance of NEW_TYPE * @param the target type of the transformation * @return a new FluentIterable of the new type */ @Override public final FluentIterable map(Function function) { List temporaryList = new ArrayList<>(); Iterator iterator = iterator(); while (iterator.hasNext()) { temporaryList.add(function.apply(iterator.next())); } return from(temporaryList); } /** * Collects all remaining objects of this Iterable into a list. * * @return a list with all remaining objects of this Iterable */ @Override public List asList() { return toList(iterable.iterator()); } /** * @return a FluentIterable from a given iterable. Calls the SimpleFluentIterable constructor. */ public static final FluentIterable from(Iterable iterable) { return new SimpleFluentIterable<>(iterable); } public static final FluentIterable fromCopyOf(Iterable iterable) { List copy = FluentIterable.copyToList(iterable); return new SimpleFluentIterable<>(copy); } @Override public Iterator iterator() { return iterable.iterator(); } @Override public void forEach(Consumer action) { iterable.forEach(action); } @Override public Spliterator spliterator() { return iterable.spliterator(); } /** * @return the count of remaining objects of the current Iterable */ public final int getRemainingElementsCount() { int counter = 0; Iterator iterator = iterator(); while (iterator.hasNext()) { iterator.next(); counter++; } return counter; } /** * Collects the remaining objects of the given iterator into a List. * * @return a new List with the remaining objects. */ public static List toList(Iterator iterator) { List copy = new ArrayList<>(); while (iterator.hasNext()) { copy.add(iterator.next()); } return copy; } } java-design-patterns-1.9.0/fluentinterface/src/test/000077500000000000000000000000001264154357600225105ustar00rootroot00000000000000java-design-patterns-1.9.0/fluentinterface/src/test/java/000077500000000000000000000000001264154357600234315ustar00rootroot00000000000000java-design-patterns-1.9.0/fluentinterface/src/test/java/com/000077500000000000000000000000001264154357600242075ustar00rootroot00000000000000java-design-patterns-1.9.0/fluentinterface/src/test/java/com/iluwatar/000077500000000000000000000000001264154357600260375ustar00rootroot00000000000000java-design-patterns-1.9.0/fluentinterface/src/test/java/com/iluwatar/fluentinterface/000077500000000000000000000000001264154357600312155ustar00rootroot00000000000000java-design-patterns-1.9.0/fluentinterface/src/test/java/com/iluwatar/fluentinterface/app/000077500000000000000000000000001264154357600317755ustar00rootroot00000000000000AppTest.java000066400000000000000000000002541264154357600341420ustar00rootroot00000000000000java-design-patterns-1.9.0/fluentinterface/src/test/java/com/iluwatar/fluentinterface/apppackage com.iluwatar.fluentinterface.app; import org.junit.Test; public class AppTest { @Test public void test() { String[] args = {}; App.main(args); } } fluentiterable/000077500000000000000000000000001264154357600341435ustar00rootroot00000000000000java-design-patterns-1.9.0/fluentinterface/src/test/java/com/iluwatar/fluentinterfaceFluentIterableTest.java000066400000000000000000000123401264154357600405530ustar00rootroot00000000000000java-design-patterns-1.9.0/fluentinterface/src/test/java/com/iluwatar/fluentinterface/fluentiterablepackage com.iluwatar.fluentinterface.fluentiterable; import org.junit.Test; import java.util.*; import java.util.function.Consumer; import static org.junit.Assert.*; import static org.mockito.Mockito.*; /** * Date: 12/12/15 - 7:00 PM * * @author Jeroen Meulemeester */ public abstract class FluentIterableTest { /** * Create a new {@link FluentIterable} from the given integers * * @param integers The integers * @return The new iterable, use for testing */ protected abstract FluentIterable createFluentIterable(final Iterable integers); @Test public void testFirst() throws Exception { final List integers = Arrays.asList(1, 2, 3, 10, 9, 8); final Optional first = createFluentIterable(integers).first(); assertNotNull(first); assertTrue(first.isPresent()); assertEquals(integers.get(0), first.get()); } @Test public void testFirstEmptyCollection() throws Exception { final List integers = Collections.emptyList(); final Optional first = createFluentIterable(integers).first(); assertNotNull(first); assertFalse(first.isPresent()); } @Test public void testFirstCount() throws Exception { final List integers = Arrays.asList(1, 2, 3, 10, 9, 8); final List first4 = createFluentIterable(integers) .first(4) .asList(); assertNotNull(first4); assertEquals(4, first4.size()); assertEquals(integers.get(0), first4.get(0)); assertEquals(integers.get(1), first4.get(1)); assertEquals(integers.get(2), first4.get(2)); assertEquals(integers.get(3), first4.get(3)); } @Test public void testFirstCountLessItems() throws Exception { final List integers = Arrays.asList(1, 2, 3); final List first4 = createFluentIterable(integers) .first(4) .asList(); assertNotNull(first4); assertEquals(3, first4.size()); assertEquals(integers.get(0), first4.get(0)); assertEquals(integers.get(1), first4.get(1)); assertEquals(integers.get(2), first4.get(2)); } @Test public void testLast() throws Exception { final List integers = Arrays.asList(1, 2, 3, 10, 9, 8); final Optional last = createFluentIterable(integers).last(); assertNotNull(last); assertTrue(last.isPresent()); assertEquals(integers.get(integers.size() - 1), last.get()); } @Test public void testLastEmptyCollection() throws Exception { final List integers = Collections.emptyList(); final Optional last = createFluentIterable(integers).last(); assertNotNull(last); assertFalse(last.isPresent()); } @Test public void testLastCount() throws Exception { final List integers = Arrays.asList(1, 2, 3, 10, 9, 8); final List last4 = createFluentIterable(integers) .last(4) .asList(); assertNotNull(last4); assertEquals(4, last4.size()); assertEquals(Integer.valueOf(3), last4.get(0)); assertEquals(Integer.valueOf(10), last4.get(1)); assertEquals(Integer.valueOf(9), last4.get(2)); assertEquals(Integer.valueOf(8), last4.get(3)); } @Test public void testLastCountLessItems() throws Exception { final List integers = Arrays.asList(1, 2, 3); final List last4 = createFluentIterable(integers) .last(4) .asList(); assertNotNull(last4); assertEquals(3, last4.size()); assertEquals(Integer.valueOf(1), last4.get(0)); assertEquals(Integer.valueOf(2), last4.get(1)); assertEquals(Integer.valueOf(3), last4.get(2)); } @Test public void testFilter() throws Exception { final List integers = Arrays.asList(1, 2, 3, 10, 9, 8); final List evenItems = createFluentIterable(integers) .filter(i -> i % 2 == 0) .asList(); assertNotNull(evenItems); assertEquals(3, evenItems.size()); assertEquals(Integer.valueOf(2), evenItems.get(0)); assertEquals(Integer.valueOf(10), evenItems.get(1)); assertEquals(Integer.valueOf(8), evenItems.get(2)); } @Test public void testMap() throws Exception { final List integers = Arrays.asList(1, 2, 3); final List longs = createFluentIterable(integers) .map(Integer::longValue) .asList(); assertNotNull(longs); assertEquals(integers.size(), longs.size()); assertEquals(Long.valueOf(1), longs.get(0)); assertEquals(Long.valueOf(2), longs.get(1)); assertEquals(Long.valueOf(3), longs.get(2)); } @Test public void testForEach() throws Exception { final List integers = Arrays.asList(1, 2, 3); final Consumer consumer = mock(Consumer.class); createFluentIterable(integers).forEach(consumer); verify(consumer, times(1)).accept(Integer.valueOf(1)); verify(consumer, times(1)).accept(Integer.valueOf(2)); verify(consumer, times(1)).accept(Integer.valueOf(3)); verifyNoMoreInteractions(consumer); } @Test public void testSpliterator() throws Exception { final List integers = Arrays.asList(1, 2, 3); final Spliterator split = createFluentIterable(integers).spliterator(); assertNotNull(split); } }lazy/000077500000000000000000000000001264154357600351225ustar00rootroot00000000000000java-design-patterns-1.9.0/fluentinterface/src/test/java/com/iluwatar/fluentinterface/fluentiterableLazyFluentIterableTest.java000066400000000000000000000007461264154357600424010ustar00rootroot00000000000000java-design-patterns-1.9.0/fluentinterface/src/test/java/com/iluwatar/fluentinterface/fluentiterable/lazypackage com.iluwatar.fluentinterface.fluentiterable.lazy; import com.iluwatar.fluentinterface.fluentiterable.FluentIterable; import com.iluwatar.fluentinterface.fluentiterable.FluentIterableTest; /** * Date: 12/12/15 - 7:56 PM * * @author Jeroen Meulemeester */ public class LazyFluentIterableTest extends FluentIterableTest { @Override protected FluentIterable createFluentIterable(Iterable integers) { return LazyFluentIterable.from(integers); } } simple/000077500000000000000000000000001264154357600354345ustar00rootroot00000000000000java-design-patterns-1.9.0/fluentinterface/src/test/java/com/iluwatar/fluentinterface/fluentiterableSimpleFluentIterableTest.java000066400000000000000000000007621264154357600432230ustar00rootroot00000000000000java-design-patterns-1.9.0/fluentinterface/src/test/java/com/iluwatar/fluentinterface/fluentiterable/simplepackage com.iluwatar.fluentinterface.fluentiterable.simple; import com.iluwatar.fluentinterface.fluentiterable.FluentIterable; import com.iluwatar.fluentinterface.fluentiterable.FluentIterableTest; /** * Date: 12/12/15 - 7:56 PM * * @author Jeroen Meulemeester */ public class SimpleFluentIterableTest extends FluentIterableTest { @Override protected FluentIterable createFluentIterable(Iterable integers) { return SimpleFluentIterable.fromCopyOf(integers); 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A`#OYAg :zIENDB`java-design-patterns-1.9.0/flux/etc/flux.ucls000066400000000000000000000321721264154357600211700ustar00rootroot00000000000000 java-design-patterns-1.9.0/flux/index.md000066400000000000000000000015031264154357600201720ustar00rootroot00000000000000--- layout: pattern title: Flux folder: flux permalink: /patterns/flux/ categories: Presentation Tier tags: - Java - Difficulty-Intermediate --- **Intent:** Flux eschews MVC in favor of a unidirectional data flow. When a user interacts with a view, the view propagates an action through a central dispatcher, to the various stores that hold the application's data and business logic, which updates all of the views that are affected. ![alt text](./etc/flux.png "Flux") **Applicability:** Use the Flux pattern when * you want to focus on creating explicit and understandable update paths for your application's data, which makes tracing changes during development simpler and makes bugs easier to track down and fix. **Credits:** * [Flux - Application architecture for building user interfaces](http://facebook.github.io/flux/) java-design-patterns-1.9.0/flux/pom.xml000066400000000000000000000013631264154357600200620ustar00rootroot00000000000000 4.0.0 com.iluwatar java-design-patterns 1.9.0 flux junit junit test org.mockito mockito-core test java-design-patterns-1.9.0/flux/src/000077500000000000000000000000001264154357600173315ustar00rootroot00000000000000java-design-patterns-1.9.0/flux/src/main/000077500000000000000000000000001264154357600202555ustar00rootroot00000000000000java-design-patterns-1.9.0/flux/src/main/java/000077500000000000000000000000001264154357600211765ustar00rootroot00000000000000java-design-patterns-1.9.0/flux/src/main/java/com/000077500000000000000000000000001264154357600217545ustar00rootroot00000000000000java-design-patterns-1.9.0/flux/src/main/java/com/iluwatar/000077500000000000000000000000001264154357600236045ustar00rootroot00000000000000java-design-patterns-1.9.0/flux/src/main/java/com/iluwatar/flux/000077500000000000000000000000001264154357600245625ustar00rootroot00000000000000java-design-patterns-1.9.0/flux/src/main/java/com/iluwatar/flux/action/000077500000000000000000000000001264154357600260375ustar00rootroot00000000000000java-design-patterns-1.9.0/flux/src/main/java/com/iluwatar/flux/action/Action.java000066400000000000000000000004621264154357600301210ustar00rootroot00000000000000package com.iluwatar.flux.action; /** * * Action is the data payload dispatched to the stores when something happens. * */ public abstract class Action { private ActionType type; public Action(ActionType type) { this.type = type; } public ActionType getType() { return type; } } java-design-patterns-1.9.0/flux/src/main/java/com/iluwatar/flux/action/ActionType.java000066400000000000000000000002131264154357600307550ustar00rootroot00000000000000package com.iluwatar.flux.action; /** * * Types of actions. * */ public enum ActionType { MENU_ITEM_SELECTED, CONTENT_CHANGED; } java-design-patterns-1.9.0/flux/src/main/java/com/iluwatar/flux/action/Content.java000066400000000000000000000006061264154357600303160ustar00rootroot00000000000000package com.iluwatar.flux.action; /** * * Content items. * */ public enum Content { PRODUCTS("Products - This page lists the company's products."), COMPANY( "Company - This page displays information about the company."); private String title; private Content(String title) { this.title = title; } @Override public String toString() { return title; } } java-design-patterns-1.9.0/flux/src/main/java/com/iluwatar/flux/action/ContentAction.java000066400000000000000000000005161264154357600314540ustar00rootroot00000000000000package com.iluwatar.flux.action; /** * * ContentAction is a concrete action. * */ public class ContentAction extends Action { private Content content; public ContentAction(Content content) { super(ActionType.CONTENT_CHANGED); this.content = content; } public Content getContent() { return content; } } java-design-patterns-1.9.0/flux/src/main/java/com/iluwatar/flux/action/MenuAction.java000066400000000000000000000005221264154357600307430ustar00rootroot00000000000000package com.iluwatar.flux.action; /** * * MenuAction is a concrete action. * */ public class MenuAction extends Action { private MenuItem menuItem; public MenuAction(MenuItem menuItem) { super(ActionType.MENU_ITEM_SELECTED); this.menuItem = menuItem; } public MenuItem getMenuItem() { return menuItem; } } java-design-patterns-1.9.0/flux/src/main/java/com/iluwatar/flux/action/MenuItem.java000066400000000000000000000004461264154357600304310ustar00rootroot00000000000000package com.iluwatar.flux.action; /** * * Menu items. * */ public enum MenuItem { HOME("Home"), PRODUCTS("Products"), COMPANY("Company"); private String title; MenuItem(String title) { this.title = title; } @Override public String toString() { return title; } } java-design-patterns-1.9.0/flux/src/main/java/com/iluwatar/flux/app/000077500000000000000000000000001264154357600253425ustar00rootroot00000000000000java-design-patterns-1.9.0/flux/src/main/java/com/iluwatar/flux/app/App.java000066400000000000000000000036171264154357600267340ustar00rootroot00000000000000package com.iluwatar.flux.app; import com.iluwatar.flux.action.MenuItem; import com.iluwatar.flux.dispatcher.Dispatcher; import com.iluwatar.flux.store.ContentStore; import com.iluwatar.flux.store.MenuStore; import com.iluwatar.flux.view.ContentView; import com.iluwatar.flux.view.MenuView; /** * * Flux is the application architecture that Facebook uses for building client-side web * applications. Flux eschews MVC in favor of a unidirectional data flow. When a user interacts with * a React view, the view propagates an action through a central dispatcher, to the various stores * that hold the application's data and business logic, which updates all of the views that are * affected. *

* This example has two views: menu and content. They represent typical main menu and content area * of a web page. When menu item is clicked it triggers events through the dispatcher. The events * are received and handled by the stores updating their data as needed. The stores then notify the * views that they should rerender themselves. *

* http://facebook.github.io/flux/docs/overview.html * */ public class App { /** * Program entry point * * @param args command line args */ public static void main(String[] args) { // initialize and wire the system MenuStore menuStore = new MenuStore(); Dispatcher.getInstance().registerStore(menuStore); ContentStore contentStore = new ContentStore(); Dispatcher.getInstance().registerStore(contentStore); MenuView menuView = new MenuView(); menuStore.registerView(menuView); ContentView contentView = new ContentView(); contentStore.registerView(contentView); // render initial view menuView.render(); contentView.render(); // user clicks another menu item // this triggers action dispatching and eventually causes views to render with new content menuView.itemClicked(MenuItem.COMPANY); } } java-design-patterns-1.9.0/flux/src/main/java/com/iluwatar/flux/dispatcher/000077500000000000000000000000001264154357600267105ustar00rootroot00000000000000java-design-patterns-1.9.0/flux/src/main/java/com/iluwatar/flux/dispatcher/Dispatcher.java000066400000000000000000000023201264154357600316360ustar00rootroot00000000000000package com.iluwatar.flux.dispatcher; import java.util.LinkedList; import java.util.List; import com.iluwatar.flux.action.Action; import com.iluwatar.flux.action.Content; import com.iluwatar.flux.action.ContentAction; import com.iluwatar.flux.action.MenuAction; import com.iluwatar.flux.action.MenuItem; import com.iluwatar.flux.store.Store; /** * * Dispatcher sends Actions to registered Stores. * */ public class Dispatcher { private static Dispatcher instance = new Dispatcher(); private List stores = new LinkedList<>(); private Dispatcher() {} public static Dispatcher getInstance() { return instance; } public void registerStore(Store store) { stores.add(store); } /** * Menu item selected handler */ public void menuItemSelected(MenuItem menuItem) { dispatchAction(new MenuAction(menuItem)); switch (menuItem) { case HOME: case PRODUCTS: default: dispatchAction(new ContentAction(Content.PRODUCTS)); break; case COMPANY: dispatchAction(new ContentAction(Content.COMPANY)); break; } } private void dispatchAction(Action action) { stores.stream().forEach((store) -> store.onAction(action)); } } java-design-patterns-1.9.0/flux/src/main/java/com/iluwatar/flux/store/000077500000000000000000000000001264154357600257165ustar00rootroot00000000000000java-design-patterns-1.9.0/flux/src/main/java/com/iluwatar/flux/store/ContentStore.java000066400000000000000000000012231264154357600312060ustar00rootroot00000000000000package com.iluwatar.flux.store; import com.iluwatar.flux.action.Action; import com.iluwatar.flux.action.ActionType; import com.iluwatar.flux.action.Content; import com.iluwatar.flux.action.ContentAction; /** * * ContentStore is a concrete store. * */ public class ContentStore extends Store { private Content content = Content.PRODUCTS; @Override public void onAction(Action action) { if (action.getType().equals(ActionType.CONTENT_CHANGED)) { ContentAction contentAction = (ContentAction) action; content = contentAction.getContent(); notifyChange(); } } public Content getContent() { return content; } } java-design-patterns-1.9.0/flux/src/main/java/com/iluwatar/flux/store/MenuStore.java000066400000000000000000000012061264154357600305010ustar00rootroot00000000000000package com.iluwatar.flux.store; import com.iluwatar.flux.action.Action; import com.iluwatar.flux.action.ActionType; import com.iluwatar.flux.action.MenuAction; import com.iluwatar.flux.action.MenuItem; /** * * MenuStore is a concrete store. * */ public class MenuStore extends Store { private MenuItem selected = MenuItem.HOME; @Override public void onAction(Action action) { if (action.getType().equals(ActionType.MENU_ITEM_SELECTED)) { MenuAction menuAction = (MenuAction) action; selected = menuAction.getMenuItem(); notifyChange(); } } public MenuItem getSelected() { return selected; } } java-design-patterns-1.9.0/flux/src/main/java/com/iluwatar/flux/store/Store.java000066400000000000000000000007701264154357600276610ustar00rootroot00000000000000package com.iluwatar.flux.store; import java.util.LinkedList; import java.util.List; import com.iluwatar.flux.action.Action; import com.iluwatar.flux.view.View; /** * * Store is a data model. * */ public abstract class Store { private List views = new LinkedList<>(); public abstract void onAction(Action action); public void registerView(View view) { views.add(view); } protected void notifyChange() { views.stream().forEach((view) -> view.storeChanged(this)); } } java-design-patterns-1.9.0/flux/src/main/java/com/iluwatar/flux/view/000077500000000000000000000000001264154357600255345ustar00rootroot00000000000000java-design-patterns-1.9.0/flux/src/main/java/com/iluwatar/flux/view/ContentView.java000066400000000000000000000010521264154357600306420ustar00rootroot00000000000000package com.iluwatar.flux.view; import com.iluwatar.flux.action.Content; import com.iluwatar.flux.store.ContentStore; import com.iluwatar.flux.store.Store; /** * * ContentView is a concrete view. * */ public class ContentView implements View { private Content content = Content.PRODUCTS; @Override public void storeChanged(Store store) { ContentStore contentStore = (ContentStore) store; content = contentStore.getContent(); render(); } @Override public void render() { System.out.println(content.toString()); } } java-design-patterns-1.9.0/flux/src/main/java/com/iluwatar/flux/view/MenuView.java000066400000000000000000000015371264154357600301440ustar00rootroot00000000000000package com.iluwatar.flux.view; import com.iluwatar.flux.action.MenuItem; import com.iluwatar.flux.dispatcher.Dispatcher; import com.iluwatar.flux.store.MenuStore; import com.iluwatar.flux.store.Store; /** * * MenuView is a concrete view. * */ public class MenuView implements View { private MenuItem selected = MenuItem.HOME; @Override public void storeChanged(Store store) { MenuStore menuStore = (MenuStore) store; selected = menuStore.getSelected(); render(); } @Override public void render() { for (MenuItem item : MenuItem.values()) { if (selected.equals(item)) { System.out.println(String.format("* %s", item.toString())); } else { System.out.println(item.toString()); } } } public void itemClicked(MenuItem item) { Dispatcher.getInstance().menuItemSelected(item); } } java-design-patterns-1.9.0/flux/src/main/java/com/iluwatar/flux/view/View.java000066400000000000000000000003221264154357600273060ustar00rootroot00000000000000package com.iluwatar.flux.view; import com.iluwatar.flux.store.Store; /** * * Views define the representation of data. * */ public interface View { void storeChanged(Store store); void render(); } java-design-patterns-1.9.0/flux/src/test/000077500000000000000000000000001264154357600203105ustar00rootroot00000000000000java-design-patterns-1.9.0/flux/src/test/java/000077500000000000000000000000001264154357600212315ustar00rootroot00000000000000java-design-patterns-1.9.0/flux/src/test/java/com/000077500000000000000000000000001264154357600220075ustar00rootroot00000000000000java-design-patterns-1.9.0/flux/src/test/java/com/iluwatar/000077500000000000000000000000001264154357600236375ustar00rootroot00000000000000java-design-patterns-1.9.0/flux/src/test/java/com/iluwatar/flux/000077500000000000000000000000001264154357600246155ustar00rootroot00000000000000java-design-patterns-1.9.0/flux/src/test/java/com/iluwatar/flux/action/000077500000000000000000000000001264154357600260725ustar00rootroot00000000000000java-design-patterns-1.9.0/flux/src/test/java/com/iluwatar/flux/action/ContentTest.java000066400000000000000000000007621264154357600312140ustar00rootroot00000000000000package com.iluwatar.flux.action; import org.junit.Test; import static org.junit.Assert.assertFalse; import static org.junit.Assert.assertNotNull; /** * Date: 12/12/15 - 10:11 PM * * @author Jeroen Meulemeester */ public class ContentTest { @Test public void testToString() throws Exception { for (final Content content : Content.values()) { final String toString = content.toString(); assertNotNull(toString); assertFalse(toString.trim().isEmpty()); } } } java-design-patterns-1.9.0/flux/src/test/java/com/iluwatar/flux/action/MenuItemTest.java000066400000000000000000000007671264154357600313320ustar00rootroot00000000000000package com.iluwatar.flux.action; import org.junit.Test; import static org.junit.Assert.assertFalse; import static org.junit.Assert.assertNotNull; /** * Date: 12/12/15 - 10:15 PM * * @author Jeroen Meulemeester */ public class MenuItemTest { @Test public void testToString() throws Exception { for (final MenuItem menuItem : MenuItem.values()) { final String toString = menuItem.toString(); assertNotNull(toString); assertFalse(toString.trim().isEmpty()); } } } java-design-patterns-1.9.0/flux/src/test/java/com/iluwatar/flux/app/000077500000000000000000000000001264154357600253755ustar00rootroot00000000000000java-design-patterns-1.9.0/flux/src/test/java/com/iluwatar/flux/app/AppTest.java000066400000000000000000000003041264154357600276150ustar00rootroot00000000000000package com.iluwatar.flux.app; import org.junit.Test; /** * * Application test * */ public class AppTest { @Test public void test() { String[] args = {}; App.main(args); } } java-design-patterns-1.9.0/flux/src/test/java/com/iluwatar/flux/dispatcher/000077500000000000000000000000001264154357600267435ustar00rootroot00000000000000java-design-patterns-1.9.0/flux/src/test/java/com/iluwatar/flux/dispatcher/DispatcherTest.java000066400000000000000000000064441264154357600325440ustar00rootroot00000000000000package com.iluwatar.flux.dispatcher; import com.iluwatar.flux.action.Action; import com.iluwatar.flux.action.ActionType; import com.iluwatar.flux.action.Content; import com.iluwatar.flux.action.ContentAction; import com.iluwatar.flux.action.MenuAction; import com.iluwatar.flux.action.MenuItem; import com.iluwatar.flux.store.Store; import org.junit.Before; import org.junit.Test; import org.mockito.ArgumentCaptor; import java.lang.reflect.Constructor; import java.lang.reflect.Field; import java.util.List; import java.util.stream.Collectors; import static org.junit.Assert.assertEquals; import static org.junit.Assert.assertNotNull; import static org.junit.Assert.assertSame; import static org.mockito.Mockito.mock; import static org.mockito.Mockito.times; import static org.mockito.Mockito.verify; import static org.mockito.Mockito.verifyNoMoreInteractions; /** * Date: 12/12/15 - 8:22 PM * * @author Jeroen Meulemeester */ public class DispatcherTest { /** * Dispatcher is a singleton with no way to reset it's internal state back to the beginning. * Replace the instance with a fresh one before each test to make sure test cases have no * influence on each other. */ @Before public void setUp() throws Exception { final Constructor constructor; constructor = Dispatcher.class.getDeclaredConstructor(); constructor.setAccessible(true); final Field field = Dispatcher.class.getDeclaredField("instance"); field.setAccessible(true); field.set(Dispatcher.getInstance(), constructor.newInstance()); } @Test public void testGetInstance() throws Exception { assertNotNull(Dispatcher.getInstance()); assertSame(Dispatcher.getInstance(), Dispatcher.getInstance()); } @Test public void testMenuItemSelected() throws Exception { final Dispatcher dispatcher = Dispatcher.getInstance(); final Store store = mock(Store.class); dispatcher.registerStore(store); dispatcher.menuItemSelected(MenuItem.HOME); dispatcher.menuItemSelected(MenuItem.COMPANY); // We expect 4 events, 2 menu selections and 2 content change actions final ArgumentCaptor actionCaptor = ArgumentCaptor.forClass(Action.class); verify(store, times(4)).onAction(actionCaptor.capture()); verifyNoMoreInteractions(store); final List actions = actionCaptor.getAllValues(); final List menuActions = actions.stream() .filter(a -> a.getType().equals(ActionType.MENU_ITEM_SELECTED)) .map(a -> (MenuAction) a) .collect(Collectors.toList()); final List contentActions = actions.stream() .filter(a -> a.getType().equals(ActionType.CONTENT_CHANGED)) .map(a -> (ContentAction) a) .collect(Collectors.toList()); assertEquals(2, menuActions.size()); assertEquals(1, menuActions.stream().map(MenuAction::getMenuItem).filter(MenuItem.HOME::equals).count()); assertEquals(1, menuActions.stream().map(MenuAction::getMenuItem).filter(MenuItem.COMPANY::equals).count()); assertEquals(2, contentActions.size()); assertEquals(1, contentActions.stream().map(ContentAction::getContent).filter(Content.PRODUCTS::equals).count()); assertEquals(1, contentActions.stream().map(ContentAction::getContent).filter(Content.COMPANY::equals).count()); } } java-design-patterns-1.9.0/flux/src/test/java/com/iluwatar/flux/store/000077500000000000000000000000001264154357600257515ustar00rootroot00000000000000java-design-patterns-1.9.0/flux/src/test/java/com/iluwatar/flux/store/ContentStoreTest.java000066400000000000000000000025111264154357600321020ustar00rootroot00000000000000package com.iluwatar.flux.store; import com.iluwatar.flux.action.Content; import com.iluwatar.flux.action.ContentAction; import com.iluwatar.flux.action.MenuAction; import com.iluwatar.flux.action.MenuItem; import com.iluwatar.flux.view.View; import org.junit.Test; import static org.junit.Assert.assertEquals; import static org.mockito.Matchers.eq; import static org.mockito.Mockito.mock; import static org.mockito.Mockito.times; import static org.mockito.Mockito.verify; import static org.mockito.Mockito.verifyZeroInteractions; import static org.mockito.Mockito.verifyNoMoreInteractions; /** * Date: 12/12/15 - 10:18 PM * * @author Jeroen Meulemeester */ public class ContentStoreTest { @Test public void testOnAction() throws Exception { final ContentStore contentStore = new ContentStore(); final View view = mock(View.class); contentStore.registerView(view); verifyZeroInteractions(view); // Content should not react on menu action ... contentStore.onAction(new MenuAction(MenuItem.PRODUCTS)); verifyZeroInteractions(view); // ... but it should react on a content action contentStore.onAction(new ContentAction(Content.COMPANY)); verify(view, times(1)).storeChanged(eq(contentStore)); verifyNoMoreInteractions(view); assertEquals(Content.COMPANY, contentStore.getContent()); } } java-design-patterns-1.9.0/flux/src/test/java/com/iluwatar/flux/store/MenuStoreTest.java000066400000000000000000000024561264154357600314040ustar00rootroot00000000000000package com.iluwatar.flux.store; import com.iluwatar.flux.action.Content; import com.iluwatar.flux.action.ContentAction; import com.iluwatar.flux.action.MenuAction; import com.iluwatar.flux.action.MenuItem; import com.iluwatar.flux.view.View; import org.junit.Test; import static org.junit.Assert.assertEquals; import static org.mockito.Matchers.eq; import static org.mockito.Mockito.mock; import static org.mockito.Mockito.times; import static org.mockito.Mockito.verify; import static org.mockito.Mockito.verifyZeroInteractions; import static org.mockito.Mockito.verifyNoMoreInteractions; /** * Date: 12/12/15 - 10:18 PM * * @author Jeroen Meulemeester */ public class MenuStoreTest { @Test public void testOnAction() throws Exception { final MenuStore menuStore = new MenuStore(); final View view = mock(View.class); menuStore.registerView(view); verifyZeroInteractions(view); // Menu should not react on content action ... menuStore.onAction(new ContentAction(Content.COMPANY)); verifyZeroInteractions(view); // ... but it should react on a menu action menuStore.onAction(new MenuAction(MenuItem.PRODUCTS)); verify(view, times(1)).storeChanged(eq(menuStore)); verifyNoMoreInteractions(view); assertEquals(MenuItem.PRODUCTS, menuStore.getSelected()); } } java-design-patterns-1.9.0/flux/src/test/java/com/iluwatar/flux/view/000077500000000000000000000000001264154357600255675ustar00rootroot00000000000000java-design-patterns-1.9.0/flux/src/test/java/com/iluwatar/flux/view/ContentViewTest.java000066400000000000000000000014541264154357600315430ustar00rootroot00000000000000package com.iluwatar.flux.view; import com.iluwatar.flux.action.Content; import com.iluwatar.flux.store.ContentStore; import org.junit.Test; import static org.mockito.Mockito.mock; import static org.mockito.Mockito.times; import static org.mockito.Mockito.verify; import static org.mockito.Mockito.when; import static org.mockito.Mockito.verifyNoMoreInteractions; /** * Date: 12/12/15 - 10:31 PM * * @author Jeroen Meulemeester */ public class ContentViewTest { @Test public void testStoreChanged() throws Exception { final ContentStore store = mock(ContentStore.class); when(store.getContent()).thenReturn(Content.PRODUCTS); final ContentView view = new ContentView(); view.storeChanged(store); verify(store, times(1)).getContent(); verifyNoMoreInteractions(store); } } java-design-patterns-1.9.0/flux/src/test/java/com/iluwatar/flux/view/MenuViewTest.java000066400000000000000000000024671264154357600310420ustar00rootroot00000000000000package com.iluwatar.flux.view; import com.iluwatar.flux.action.Action; import com.iluwatar.flux.action.MenuItem; import com.iluwatar.flux.dispatcher.Dispatcher; import com.iluwatar.flux.store.MenuStore; import com.iluwatar.flux.store.Store; import org.junit.Test; import static org.mockito.Matchers.any; 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Apply the Flyweight pattern when all of the following are true * an application uses a large number of objects * storage costs are high because of the sheer quantity of objects * most object state can be made extrinsic * many groups of objects may be replaced by relatively few shared objects once extrinsic state is removed * the application doesn't depend on object identity. Since flyweight objects may be shared, identity tests will return true for conceptually distinct objects. **Real world examples:** * [java.lang.Integer#valueOf(int)](http://docs.oracle.com/javase/8/docs/api/java/lang/Integer.html#valueOf%28int%29) **Credits** * [Design Patterns: Elements of Reusable Object-Oriented Software](http://www.amazon.com/Design-Patterns-Elements-Reusable-Object-Oriented/dp/0201633612) java-design-patterns-1.9.0/flyweight/pom.xml000066400000000000000000000011521264154357600211020ustar00rootroot00000000000000 4.0.0 com.iluwatar java-design-patterns 1.9.0 flyweight junit junit test java-design-patterns-1.9.0/flyweight/src/000077500000000000000000000000001264154357600203555ustar00rootroot00000000000000java-design-patterns-1.9.0/flyweight/src/main/000077500000000000000000000000001264154357600213015ustar00rootroot00000000000000java-design-patterns-1.9.0/flyweight/src/main/java/000077500000000000000000000000001264154357600222225ustar00rootroot00000000000000java-design-patterns-1.9.0/flyweight/src/main/java/com/000077500000000000000000000000001264154357600230005ustar00rootroot00000000000000java-design-patterns-1.9.0/flyweight/src/main/java/com/iluwatar/000077500000000000000000000000001264154357600246305ustar00rootroot00000000000000java-design-patterns-1.9.0/flyweight/src/main/java/com/iluwatar/flyweight/000077500000000000000000000000001264154357600266325ustar00rootroot00000000000000java-design-patterns-1.9.0/flyweight/src/main/java/com/iluwatar/flyweight/AlchemistShop.java000066400000000000000000000041251264154357600322420ustar00rootroot00000000000000package com.iluwatar.flyweight; import java.util.ArrayList; import java.util.Collections; import java.util.List; /** * * AlchemistShop holds potions on its shelves. It uses PotionFactory to provide the potions. * */ public class AlchemistShop { private List topShelf; private List bottomShelf; /** * Constructor */ public AlchemistShop() { topShelf = new ArrayList<>(); bottomShelf = new ArrayList<>(); fillShelves(); } private void fillShelves() { PotionFactory factory = new PotionFactory(); topShelf.add(factory.createPotion(PotionType.INVISIBILITY)); topShelf.add(factory.createPotion(PotionType.INVISIBILITY)); topShelf.add(factory.createPotion(PotionType.STRENGTH)); topShelf.add(factory.createPotion(PotionType.HEALING)); topShelf.add(factory.createPotion(PotionType.INVISIBILITY)); topShelf.add(factory.createPotion(PotionType.STRENGTH)); topShelf.add(factory.createPotion(PotionType.HEALING)); topShelf.add(factory.createPotion(PotionType.HEALING)); bottomShelf.add(factory.createPotion(PotionType.POISON)); bottomShelf.add(factory.createPotion(PotionType.POISON)); bottomShelf.add(factory.createPotion(PotionType.POISON)); bottomShelf.add(factory.createPotion(PotionType.HOLY_WATER)); bottomShelf.add(factory.createPotion(PotionType.HOLY_WATER)); } /** * Get a read-only list of all the items on the top shelf * * @return The top shelf potions */ public final List getTopShelf() { return Collections.unmodifiableList(this.topShelf); } /** * Get a read-only list of all the items on the bottom shelf * * @return The bottom shelf potions */ public final List getBottomShelf() { return Collections.unmodifiableList(this.bottomShelf); } /** * Enumerate potions */ public void enumerate() { System.out.println("Enumerating top shelf potions\n"); for (Potion p : topShelf) { p.drink(); } System.out.println("\nEnumerating bottom shelf potions\n"); for (Potion p : bottomShelf) { p.drink(); } } } java-design-patterns-1.9.0/flyweight/src/main/java/com/iluwatar/flyweight/App.java000066400000000000000000000016251264154357600302210ustar00rootroot00000000000000package com.iluwatar.flyweight; /** * * Flyweight pattern is useful when the program needs a huge amount of objects. It provides means to * decrease resource usage by sharing object instances. *

* In this example {@link AlchemistShop} has great amount of potions on its shelves. To fill the * shelves {@link AlchemistShop} uses {@link PotionFactory} (which represents the Flyweight in this * example). Internally {@link PotionFactory} holds a map of the potions and lazily creates new ones * when requested. *

* To enable safe sharing, between clients and threads, Flyweight objects must be immutable. * Flyweight objects are by definition value objects. * */ public class App { /** * Program entry point * * @param args command line args */ public static void main(String[] args) { AlchemistShop alchemistShop = new AlchemistShop(); alchemistShop.enumerate(); } } java-design-patterns-1.9.0/flyweight/src/main/java/com/iluwatar/flyweight/HealingPotion.java000066400000000000000000000003661264154357600322420ustar00rootroot00000000000000package com.iluwatar.flyweight; /** * * HealingPotion * */ public class HealingPotion implements Potion { @Override public void drink() { System.out.println("You feel healed. (Potion=" + System.identityHashCode(this) + ")"); } } java-design-patterns-1.9.0/flyweight/src/main/java/com/iluwatar/flyweight/HolyWaterPotion.java000066400000000000000000000003731264154357600326070ustar00rootroot00000000000000package com.iluwatar.flyweight; /** * * HolyWaterPotion * */ public class HolyWaterPotion implements Potion { @Override public void drink() { System.out.println("You feel blessed. (Potion=" + System.identityHashCode(this) + ")"); } } java-design-patterns-1.9.0/flyweight/src/main/java/com/iluwatar/flyweight/InvisibilityPotion.java000066400000000000000000000004051264154357600333430ustar00rootroot00000000000000package com.iluwatar.flyweight; /** * * InvisibilityPotion * */ public class InvisibilityPotion implements Potion { @Override public void drink() { System.out.println("You become invisible. (Potion=" + System.identityHashCode(this) + ")"); } } java-design-patterns-1.9.0/flyweight/src/main/java/com/iluwatar/flyweight/PoisonPotion.java000066400000000000000000000003741264154357600321410ustar00rootroot00000000000000package com.iluwatar.flyweight; /** * * PoisonPotion * */ public class PoisonPotion implements Potion { @Override public void drink() { System.out.println("Urgh! This is poisonous. (Potion=" + System.identityHashCode(this) + ")"); } } java-design-patterns-1.9.0/flyweight/src/main/java/com/iluwatar/flyweight/Potion.java000066400000000000000000000002031264154357600307400ustar00rootroot00000000000000package com.iluwatar.flyweight; /** * * Interface for Potions. * */ public interface Potion { void drink(); } java-design-patterns-1.9.0/flyweight/src/main/java/com/iluwatar/flyweight/PotionFactory.java000066400000000000000000000024501264154357600322760ustar00rootroot00000000000000package com.iluwatar.flyweight; import java.util.EnumMap; import java.util.Map; /** * * PotionFactory is the Flyweight in this example. It minimizes memory use by sharing object * instances. It holds a map of potion instances and new potions are created only when none of the * type already exists. * */ public class PotionFactory { private final Map potions; public PotionFactory() { potions = new EnumMap<>(PotionType.class); } Potion createPotion(PotionType type) { Potion potion = potions.get(type); if (potion == null) { switch (type) { case HEALING: potion = new HealingPotion(); potions.put(type, potion); break; case HOLY_WATER: potion = new HolyWaterPotion(); potions.put(type, potion); break; case INVISIBILITY: potion = new InvisibilityPotion(); potions.put(type, potion); break; case POISON: potion = new PoisonPotion(); potions.put(type, potion); break; case STRENGTH: potion = new StrengthPotion(); potions.put(type, potion); break; default: break; } } return potion; } } java-design-patterns-1.9.0/flyweight/src/main/java/com/iluwatar/flyweight/PotionType.java000066400000000000000000000002561264154357600316120ustar00rootroot00000000000000package com.iluwatar.flyweight; /** * * Enumeration for potion types. * */ public enum PotionType { HEALING, INVISIBILITY, STRENGTH, HOLY_WATER, POISON } java-design-patterns-1.9.0/flyweight/src/main/java/com/iluwatar/flyweight/StrengthPotion.java000066400000000000000000000003701264154357600324640ustar00rootroot00000000000000package com.iluwatar.flyweight; /** * * StrengthPotion * */ public class StrengthPotion implements Potion { @Override public void drink() { System.out.println("You feel strong. (Potion=" + System.identityHashCode(this) + ")"); } } java-design-patterns-1.9.0/flyweight/src/test/000077500000000000000000000000001264154357600213345ustar00rootroot00000000000000java-design-patterns-1.9.0/flyweight/src/test/java/000077500000000000000000000000001264154357600222555ustar00rootroot00000000000000java-design-patterns-1.9.0/flyweight/src/test/java/com/000077500000000000000000000000001264154357600230335ustar00rootroot00000000000000java-design-patterns-1.9.0/flyweight/src/test/java/com/iluwatar/000077500000000000000000000000001264154357600246635ustar00rootroot00000000000000java-design-patterns-1.9.0/flyweight/src/test/java/com/iluwatar/flyweight/000077500000000000000000000000001264154357600266655ustar00rootroot00000000000000java-design-patterns-1.9.0/flyweight/src/test/java/com/iluwatar/flyweight/AlchemistShopTest.java000066400000000000000000000017531264154357600331410ustar00rootroot00000000000000package com.iluwatar.flyweight; import org.junit.Test; import java.util.ArrayList; import java.util.List; import static org.junit.Assert.assertEquals; import static org.junit.Assert.assertNotNull; /** * Date: 12/12/15 - 10:54 PM * * @author Jeroen Meulemeester */ public class AlchemistShopTest { @Test public void testShop() throws Exception { final AlchemistShop shop = new AlchemistShop(); final List bottomShelf = shop.getBottomShelf(); assertNotNull(bottomShelf); assertEquals(5, bottomShelf.size()); final List topShelf = shop.getTopShelf(); assertNotNull(topShelf); assertEquals(8, topShelf.size()); final List allPotions = new ArrayList<>(); allPotions.addAll(topShelf); allPotions.addAll(bottomShelf); // There are 13 potion instances, but only 5 unique instance types assertEquals(13, allPotions.size()); assertEquals(5, allPotions.stream().map(System::identityHashCode).distinct().count()); } } java-design-patterns-1.9.0/flyweight/src/test/java/com/iluwatar/flyweight/AppTest.java000066400000000000000000000003051264154357600311060ustar00rootroot00000000000000package com.iluwatar.flyweight; import org.junit.Test; /** * * Application test * */ public class AppTest { @Test public void test() { String[] args = {}; App.main(args); } } java-design-patterns-1.9.0/front-controller/000077500000000000000000000000001264154357600210755ustar00rootroot00000000000000java-design-patterns-1.9.0/front-controller/etc/000077500000000000000000000000001264154357600216505ustar00rootroot00000000000000java-design-patterns-1.9.0/front-controller/etc/front-controller.png000066400000000000000000000660301264154357600256740ustar00rootroot00000000000000PNG  IHDRCkIDATxml$y0A 'l͋rur82t"t>6BqG҆\ٲ80Ƣ,O-mJٱb`l&\\prD>jgS]U]:bGP~ Ђ^&s-hGFQA@ZQᨠQE-pT("qT{K\, Rzq GsT}juWQiE-d:nXo*kzsZ8*0G괕%kwREjV,V&9 1`דwI(Ӟ[2ؠjaɄ?K[#AZ;*(=cw0bY{=E G)dh0^nuSwsNm5qT`h@ GF6L]31}_ %ʤ;*hUOR~Nʹ-[s@Z(*Ҏ ,N߸lt۲щIuT Y)-WCUUP)ۤ l-h!T+uu{J-3Rvlʷc먒N~T0ޠE-8*7 ;!=Ao'o (RGT*xKVƻGTmg"2ՠtwiwW%C&2ij~Sw?t~es@Z(h@ 8*4  Z G-hGFQA@ZQᨠQE-vߛxǗbYਠ E-T>?F{^\yneF {q_͜٤Q9E-T쨄mz'__xr ,ֈlL\;D{gG0*h@ U:߻nRK}#|xUʻ5RҬyI!pT`h@ U:s=|;/x݁oq^\˻3ʩ VʭЊN+7fP]~=rpw/wD(wm琜&%Rӊq][o=QA@ZQ=sw>s};Xwu÷H''9x`%]:9w}ĨᨠaE-T\G5og^/|G,먤X;dq\ou{=לUګGP\y3_;gtIJX#-]ȻT/ɵJ7s\ZM~8*0 *{ŏ~b}ī~UJ9ԱN[% V3׮GFPxToGzU{n|I|ש5/LsT^oo^Q -h!Q\מ _E1ae\:sVРltǺ]qG{FNhzB${MKJ(?:.8*4Gu?~緟WLxm}wTRMOX77@Dߢ%{#Z_\# ?=[g#.8*4GGg^9sճ^ΊxU֖.9U8 FnUMIk,{* -h!Q[~nK8q++%QykI*\#%l (nԎʯ#ou -h!QE+u{JZ=ꨠE-dL{z+|X&dQQ-!]57R8d?sE?*GOGĂH.~֯x=oʊYij~zxe?.8*gILf>Q8*0qqTAt)􍙎kAZG5)UE0 GFPjb<33w{}}}wwsGU5jmmkt +pT8*qO9a]A-01hFdhOOOz=㮠bpT峵|`ffmu(\zujj*04@illl#G;?wyg{4VK8wdDv'O\^^lQ qUBfgg暙ko SRbګrQAQZݞpBM\= 9"Xw6Pzզvvv%h8*!eqmcaaass3Y&L;_PznnLIsNwy'}@^=z2x J5,ֽ;vJ*OO݃0^v3jʊ+DHcDž fggʵX `G+ܝr=7"aۉ?>}LpT133\?555U Gw`bbb.c*|@Y#m0ɴ gssnV#ױ;e K{ P8*鈋\ϡ%c1fuX `Nrg#wql J4SG|}q*k00@.C^&/0TI}`ԡ 8*lnn9r$!=1S8TVh#BpbP%``aY__ @*۶^_c5%c`aqPYCHԩS(Vr 9Rnփ[|tpT PPuA\z}qn6pX<7   !0AN*Yg Cspp8 uT,,,Ć%pQx?%*LP&tPG*  #GyC;3\Q Upf&&&bŭj4}ZPG5nc64qk۶,MG ԩSs7 "-ʪFV.* .Խ#P)x~fff6d :zuT lmakǏ3'`CQ,//OMMսuT㎮^^@Z <OE ? 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OesvK&CTm3,giqT`$h BIbJje;,UhҞLrW2YqvxyO/yW;9DI6G8*0 ի(VZe86mgNH,x(Q&QF+z7|Cmvmm!zZBx)awvvecʮ7.ݶlteRU<~qJ˕PUT6[@yirrRu}cccffF^wT}C V:Ǻ=WQ);6۱uTIE?*o"Bjeeeqq17Q_ ) z;yA]=bepT[2ޥX?*wj<fyyOb9X/Cg:A>=*JLxe9*gT}g G qԩ`ЙCf$pT`h(;Nߕ+WpT8*hh4=~wjj GF s8尸8==?8*4 0 6]\G, Z G-hGFPQk{k7i/wŲXS1-pT`h@ Eg?H=|ϋ+| ,ֈ33=a?3gQE-쨄mz'__xr ,ֈ SY.Q E-樾cK/u_G=(u&ŠF-ha4GvpeOџ{g~ʕ5󉕑5r7?u`{+yWŕ̡< 3O '*ZsgQ0]~=rp7җ;s"BʻfAKn\Mؠ6fDqj]UT`AZQ=sw>s};nW;zTGrw?%-9>[vyee"!יyʫ7+%-h@ 9ui/Ͼ./|G,5+nTew98$ .Oj+"lW E-樺+W߾to~YwS.XkD³~Q G0{ߐW~(7I:ij~V?ߒQk˪J0o8*o"FsT"?gՏ>''nx5Z^\zo@UO60rM'rK~|EI)m=zBV?r\ `h@ Eա3ߧ}n1 L-h"pT0^E-pT("pT8*hh@ 8*4  Z G-hGFQA@Z0QG?eQA#AZ0Qi@8*h6h@ :`:`ξ`Κ\=}8*0dn|C>)8H^\?J|W :} ZBiJњxپ8uT{R}^pʩUrݛSgf;#UU=m8*02W X)Qyf뭌xRyWqT`h@ c_G帢NwNy5U6^Vd;AZҏ%)FuTRהo}T 7՟E_QE-_ʬr 㟖:I?乫[|~^8*1jGQA@ZQᨠQE-pT("pT8*hh@ 8*4 7@3 }5/6L«r͵K{8*h@ }:_gοX<Ǻ9ohpmoݞNQE2%J2Iݭo\~b'{{nVv>7orS:s8*4Gu?~緟WL8]_- JX[:8M~ T9V;V?[S{>.վ _ l-h!QWΜ}_2wUǔ|'lSMO]«x'w`O~b2=E-97=~-w'ſbe\H,%^a *d4*J6ʯU8N"Չ^s/>^<-_+Qj:*U$j"+oW8cݞR:*osS_{ܙ DUؽ)Rs(8*(I(pIENDB`java-design-patterns-1.9.0/front-controller/etc/front-controller.ucls000066400000000000000000000203721264154357600260550ustar00rootroot00000000000000 java-design-patterns-1.9.0/front-controller/index.md000066400000000000000000000023171264154357600225310ustar00rootroot00000000000000--- layout: pattern title: Front Controller folder: front-controller permalink: /patterns/front-controller/ categories: Presentation Tier tags: - Java - Difficulty-Intermediate --- **Intent:** Introduce a common handler for all requests for a web site. This way we can encapsulate common functionality such as security, internationalization, routing and logging in a single place. ![alt text](./etc/front-controller.png "Front Controller") **Applicability:** Use the Front Controller pattern when * you want to encapsulate common request handling functionality in single place * you want to implements dynamic request handling i.e. change routing without modifying code * make web server configuration portable, you only need to register the handler web server specific way **Real world examples:** * [Apache Struts](https://struts.apache.org/) **Credits:** * [J2EE Design Patterns](http://www.amazon.com/J2EE-Design-Patterns-William-Crawford/dp/0596004273/ref=sr_1_2) * [Presentation Tier Patterns](http://www.javagyan.com/tutorials/corej2eepatterns/presentation-tier-patterns) * [Patterns of Enterprise Application Architecture](http://www.amazon.com/Patterns-Enterprise-Application-Architecture-Martin/dp/0321127420) java-design-patterns-1.9.0/front-controller/pom.xml000066400000000000000000000013271264154357600224150ustar00rootroot00000000000000 4.0.0 com.iluwatar java-design-patterns 1.9.0 front-controller junit junit test org.mockito mockito-core test java-design-patterns-1.9.0/front-controller/src/000077500000000000000000000000001264154357600216645ustar00rootroot00000000000000java-design-patterns-1.9.0/front-controller/src/main/000077500000000000000000000000001264154357600226105ustar00rootroot00000000000000java-design-patterns-1.9.0/front-controller/src/main/java/000077500000000000000000000000001264154357600235315ustar00rootroot00000000000000java-design-patterns-1.9.0/front-controller/src/main/java/com/000077500000000000000000000000001264154357600243075ustar00rootroot00000000000000java-design-patterns-1.9.0/front-controller/src/main/java/com/iluwatar/000077500000000000000000000000001264154357600261375ustar00rootroot00000000000000java-design-patterns-1.9.0/front-controller/src/main/java/com/iluwatar/front/000077500000000000000000000000001264154357600272675ustar00rootroot00000000000000java-design-patterns-1.9.0/front-controller/src/main/java/com/iluwatar/front/controller/000077500000000000000000000000001264154357600314525ustar00rootroot00000000000000java-design-patterns-1.9.0/front-controller/src/main/java/com/iluwatar/front/controller/App.java000066400000000000000000000024441264154357600330410ustar00rootroot00000000000000package com.iluwatar.front.controller; /** * * The Front Controller is a presentation tier pattern. Essentially it defines a controller that * handles all requests for a web site. *

* The Front Controller pattern consolidates request handling through a single handler object ( * {@link FrontController}). This object can carry out the common the behavior such as * authorization, request logging and routing requests to corresponding views. *

* Typically the requests are mapped to command objects ({@link Command}) which then display the * correct view ({@link View}). *

* In this example we have implemented two views: {@link ArcherView} and {@link CatapultView}. These * are displayed by sending correct request to the {@link FrontController} object. For example, the * {@link ArcherView} gets displayed when {@link FrontController} receives request "Archer". When * the request is unknown, we display the error view ({@link ErrorView}). * */ public class App { /** * Program entry point * * @param args * command line args */ public static void main(String[] args) { FrontController controller = new FrontController(); controller.handleRequest("Archer"); controller.handleRequest("Catapult"); controller.handleRequest("foobar"); } } ApplicationException.java000066400000000000000000000004131264154357600363560ustar00rootroot00000000000000java-design-patterns-1.9.0/front-controller/src/main/java/com/iluwatar/front/controllerpackage com.iluwatar.front.controller; /** * * Custom exception type * */ public class ApplicationException extends RuntimeException { private static final long serialVersionUID = 1L; public ApplicationException(Throwable cause) { super(cause); } } ArcherCommand.java000066400000000000000000000003141264154357600347370ustar00rootroot00000000000000java-design-patterns-1.9.0/front-controller/src/main/java/com/iluwatar/front/controllerpackage com.iluwatar.front.controller; /** * * Command for archers. * */ public class ArcherCommand implements Command { @Override public void process() { new ArcherView().display(); } } ArcherView.java000066400000000000000000000003211264154357600342710ustar00rootroot00000000000000java-design-patterns-1.9.0/front-controller/src/main/java/com/iluwatar/front/controllerpackage com.iluwatar.front.controller; /** * * View for archers. * */ public class ArcherView implements View { @Override public void display() { System.out.println("Displaying archers"); } } CatapultCommand.java000066400000000000000000000003221264154357600353070ustar00rootroot00000000000000java-design-patterns-1.9.0/front-controller/src/main/java/com/iluwatar/front/controllerpackage com.iluwatar.front.controller; /** * * Command for catapults. * */ public class CatapultCommand implements Command { @Override public void process() { new CatapultView().display(); } } CatapultView.java000066400000000000000000000003271264154357600346500ustar00rootroot00000000000000java-design-patterns-1.9.0/front-controller/src/main/java/com/iluwatar/front/controllerpackage com.iluwatar.front.controller; /** * * View for catapults. * */ public class CatapultView implements View { @Override public void display() { System.out.println("Displaying catapults"); } } java-design-patterns-1.9.0/front-controller/src/main/java/com/iluwatar/front/controller/Command.java000066400000000000000000000002441264154357600336730ustar00rootroot00000000000000package com.iluwatar.front.controller; /** * * Commands are the intermediary between requests and views. * */ public interface Command { void process(); } ErrorView.java000066400000000000000000000003061264154357600341610ustar00rootroot00000000000000java-design-patterns-1.9.0/front-controller/src/main/java/com/iluwatar/front/controllerpackage com.iluwatar.front.controller; /** * * View for errors. * */ public class ErrorView implements View { @Override public void display() { System.out.println("Error 500"); } } FrontController.java000066400000000000000000000014701264154357600353740ustar00rootroot00000000000000java-design-patterns-1.9.0/front-controller/src/main/java/com/iluwatar/front/controllerpackage com.iluwatar.front.controller; /** * * FrontController is the handler class that takes in all the requests and renders the correct * response. * */ public class FrontController { public void handleRequest(String request) { Command command = getCommand(request); command.process(); } private Command getCommand(String request) { Class commandClass = getCommandClass(request); try { return (Command) commandClass.newInstance(); } catch (Exception e) { throw new ApplicationException(e); } } private Class getCommandClass(String request) { Class result; try { result = Class.forName("com.iluwatar.front.controller." + request + "Command"); } catch (ClassNotFoundException e) { result = UnknownCommand.class; } return result; } } UnknownCommand.java000066400000000000000000000003561264154357600352000ustar00rootroot00000000000000java-design-patterns-1.9.0/front-controller/src/main/java/com/iluwatar/front/controllerpackage com.iluwatar.front.controller; /** * * Default command in case the mapping is not successful. * */ public class UnknownCommand implements Command { @Override public void process() { new ErrorView().display(); } } java-design-patterns-1.9.0/front-controller/src/main/java/com/iluwatar/front/controller/View.java000066400000000000000000000002341264154357600332260ustar00rootroot00000000000000package com.iluwatar.front.controller; /** * * Views are the representations rendered for the user. * */ public interface View { void display(); } java-design-patterns-1.9.0/front-controller/src/test/000077500000000000000000000000001264154357600226435ustar00rootroot00000000000000java-design-patterns-1.9.0/front-controller/src/test/java/000077500000000000000000000000001264154357600235645ustar00rootroot00000000000000java-design-patterns-1.9.0/front-controller/src/test/java/com/000077500000000000000000000000001264154357600243425ustar00rootroot00000000000000java-design-patterns-1.9.0/front-controller/src/test/java/com/iluwatar/000077500000000000000000000000001264154357600261725ustar00rootroot00000000000000java-design-patterns-1.9.0/front-controller/src/test/java/com/iluwatar/front/000077500000000000000000000000001264154357600273225ustar00rootroot00000000000000java-design-patterns-1.9.0/front-controller/src/test/java/com/iluwatar/front/controller/000077500000000000000000000000001264154357600315055ustar00rootroot00000000000000java-design-patterns-1.9.0/front-controller/src/test/java/com/iluwatar/front/controller/AppTest.java000066400000000000000000000003141264154357600337260ustar00rootroot00000000000000package com.iluwatar.front.controller; import org.junit.Test; /** * * Application test * */ public class AppTest { @Test public void test() { String[] args = {}; App.main(args); } } ApplicationExceptionTest.java000066400000000000000000000006061264154357600372550ustar00rootroot00000000000000java-design-patterns-1.9.0/front-controller/src/test/java/com/iluwatar/front/controllerpackage com.iluwatar.front.controller; import static org.junit.Assert.assertSame; import org.junit.Test; /** * Date: 12/13/15 - 1:35 PM * * @author Jeroen Meulemeester */ public class ApplicationExceptionTest { @Test public void testCause() throws Exception { final Exception cause = new Exception(); assertSame(cause, new ApplicationException(cause).getCause()); } }CommandTest.java000066400000000000000000000033041264154357600345070ustar00rootroot00000000000000java-design-patterns-1.9.0/front-controller/src/test/java/com/iluwatar/front/controllerpackage com.iluwatar.front.controller; import org.junit.Test; import org.junit.runner.RunWith; import org.junit.runners.Parameterized; import org.junit.runners.Parameterized.Parameters; import java.util.ArrayList; import java.util.List; import static org.mockito.Mockito.verify; import static org.mockito.Mockito.verifyNoMoreInteractions; import static org.mockito.Mockito.verifyZeroInteractions; /** * Date: 12/13/15 - 1:39 PM * * @author Jeroen Meulemeester */ @RunWith(Parameterized.class) public class CommandTest extends StdOutTest { @Parameters public static List data() { final List parameters = new ArrayList<>(); parameters.add(new Object[]{"Archer", "Displaying archers"}); parameters.add(new Object[]{"Catapult", "Displaying catapults"}); parameters.add(new Object[]{"NonExistentCommand", "Error 500"}); return parameters; } /** * The view that's been tested */ private final String request; /** * The expected display message */ private final String displayMessage; /** * Create a new instance of the {@link CommandTest} with the given view and expected message * * @param request The request that's been tested * @param displayMessage The expected display message */ public CommandTest(final String request, final String displayMessage) { this.displayMessage = displayMessage; this.request = request; } @Test public void testDisplay() { final FrontController frontController = new FrontController(); verifyZeroInteractions(getStdOutMock()); frontController.handleRequest(request); verify(getStdOutMock()).println(displayMessage); verifyNoMoreInteractions(getStdOutMock()); } } FrontControllerTest.java000066400000000000000000000032411264154357600362650ustar00rootroot00000000000000java-design-patterns-1.9.0/front-controller/src/test/java/com/iluwatar/front/controllerpackage com.iluwatar.front.controller; import org.junit.Test; import org.junit.runner.RunWith; import org.junit.runners.Parameterized; import org.junit.runners.Parameterized.Parameters; import java.util.ArrayList; import java.util.List; import static org.mockito.Mockito.verify; import static org.mockito.Mockito.verifyNoMoreInteractions; import static org.mockito.Mockito.verifyZeroInteractions; /** * Date: 12/13/15 - 1:39 PM * * @author Jeroen Meulemeester */ @RunWith(Parameterized.class) public class FrontControllerTest extends StdOutTest { @Parameters public static List data() { final List parameters = new ArrayList<>(); parameters.add(new Object[]{new ArcherCommand(), "Displaying archers"}); parameters.add(new Object[]{new CatapultCommand(), "Displaying catapults"}); parameters.add(new Object[]{new UnknownCommand(), "Error 500"}); return parameters; } /** * The view that's been tested */ private final Command command; /** * The expected display message */ private final String displayMessage; /** * Create a new instance of the {@link FrontControllerTest} with the given view and expected message * * @param command The command that's been tested * @param displayMessage The expected display message */ public FrontControllerTest(final Command command, final String displayMessage) { this.displayMessage = displayMessage; this.command = command; } @Test public void testDisplay() { verifyZeroInteractions(getStdOutMock()); this.command.process(); verify(getStdOutMock()).println(displayMessage); verifyNoMoreInteractions(getStdOutMock()); } } StdOutTest.java000066400000000000000000000023531264154357600343560ustar00rootroot00000000000000java-design-patterns-1.9.0/front-controller/src/test/java/com/iluwatar/front/controllerpackage com.iluwatar.front.controller; import org.junit.After; import org.junit.Before; import java.io.PrintStream; import static org.mockito.Mockito.mock; /** * Date: 12/10/15 - 8:37 PM * * @author Jeroen Meulemeester */ public abstract class StdOutTest { /** * The mocked standard out {@link PrintStream}, required since the actions of the views don't have * any influence on any other accessible objects, except for writing to std-out using {@link * System#out} */ private final PrintStream stdOutMock = mock(PrintStream.class); /** * Keep the original std-out so it can be restored after the test */ private final PrintStream stdOutOrig = System.out; /** * Inject the mocked std-out {@link PrintStream} into the {@link System} class before each test */ @Before public void setUp() { System.setOut(this.stdOutMock); } /** * Removed the mocked std-out {@link PrintStream} again from the {@link System} class */ @After public void tearDown() { System.setOut(this.stdOutOrig); } /** * Get the mocked stdOut {@link PrintStream} * * @return The stdOut print stream mock, renewed before each test */ final PrintStream getStdOutMock() { return this.stdOutMock; } } ViewTest.java000066400000000000000000000031341264154357600340440ustar00rootroot00000000000000java-design-patterns-1.9.0/front-controller/src/test/java/com/iluwatar/front/controllerpackage com.iluwatar.front.controller; import org.junit.Test; import org.junit.runner.RunWith; import org.junit.runners.Parameterized; import org.junit.runners.Parameterized.Parameters; import java.util.ArrayList; import java.util.List; import static org.mockito.Mockito.verify; import static org.mockito.Mockito.verifyNoMoreInteractions; import static org.mockito.Mockito.verifyZeroInteractions; /** * Date: 12/13/15 - 1:39 PM * * @author Jeroen Meulemeester */ @RunWith(Parameterized.class) public class ViewTest extends StdOutTest { @Parameters public static List data() { final List parameters = new ArrayList<>(); parameters.add(new Object[]{new ArcherView(), "Displaying archers"}); parameters.add(new Object[]{new CatapultView(), "Displaying catapults"}); parameters.add(new Object[]{new ErrorView(), "Error 500"}); return parameters; } /** * The view that's been tested */ private final View view; /** * The expected display message */ private final String displayMessage; /** * Create a new instance of the {@link ViewTest} with the given view and expected message * * @param view The view that's been tested * @param displayMessage The expected display message */ public ViewTest(final View view, final String displayMessage) { this.displayMessage = displayMessage; this.view = view; } @Test public void testDisplay() { verifyZeroInteractions(getStdOutMock()); this.view.display(); verify(getStdOutMock()).println(displayMessage); verifyNoMoreInteractions(getStdOutMock()); } }java-design-patterns-1.9.0/half-sync-half-async/000077500000000000000000000000001264154357600214735ustar00rootroot00000000000000java-design-patterns-1.9.0/half-sync-half-async/etc/000077500000000000000000000000001264154357600222465ustar00rootroot00000000000000java-design-patterns-1.9.0/half-sync-half-async/etc/half-sync-half-async.png000066400000000000000000001001421264154357600266610ustar00rootroot00000000000000PNG  IHDR-q)IDATx \Mǐma6b,YCV)bDeMR([;*5Pc[Bd-fa&[ޙ3wι uO~=yws:R o=Z < @a@--*Tˏ:@ͧ-N!*0T%0x8a0KKÖ-9<{vnݷ+ڻs4ba߯_ox|@ߗ/ { 1K޽Af?>JH NNV/_R ),#>.tVey㉜O !dÄx.Y2;J)^ϕ+<ȗY@u!>} WWkooaE|llB`AU5`+gqq&M2Ĉ2þzm>JGӧ'L"E(Ä䬐Ht~-P4Œfox9ϭ`7lj._ޭۣkNNV5Wfa6yOt)L5zAT.]ڱMH|}ɐdz^@=˄< x<ǵ@U@a0< q 0xġ2e5>fQjD"xM$Z|E#xFOnM,J *S Ts:wЦ~}59s+jowRaa}ݻ6=:Ұa}$xA];֝>ۯei/pԚa/1[[:uXYȷ֮z\:d%~߾h\j֭@5Υذ 2^{%&jBŋ^Hdg'))ɥ :uj۸qCSӾ"(m1N 1z _޽56odսҮ{MW[n[mkw$[7R͘pxsKgs vmNrX [C\vvzr,vHIkժaTB⥦Vڸ(on!N%m"$ēd an׮KJ ޒ!+(X "a|QjJ2=LNZH'kmܕ;$0p"(AjjILZ~"73ܹC9Txu,nO?'{k:p ?x[{swۭ6Fnbۿ2PxoO^ןL^23}ՐRsz\I2Şyap$&PjXdT35J è5]G6S˗3f80[Zwi޼z-ٳr>2#;@ǹ?,iöLʌZxX:A{yXxjhׯGmȫnW5pvo_;4=Lf_oΆ4OzGv%IJ:RY ~ɪm0EaTLO KKÖ-9a;%%nn?Eon3Bsm0Ea=ztef Ӷm{^ΞO < `}:U6nȘ7EW`aMq 4KpL2Pre/u{k.{=L253ӵ74앖$SӾCޅ590Ea}G"ٳg){R a$Cj'OEEyG}զ \ ͟8qpÄ._Zs'gӦ@&;-'gEE50EaV]&Fzyسg'61iҤ?d5oK|la G[f&<]IK")mr߻`mm,! x@?gf^6t)5a:wxQIEt5ׯcoE de!tІiQKvijvu+KfSсjYC3y'7e&$ur{vQQ*¦mVYRPɁ)~:B%Z{{;k,gSd˖ .fg/oԨ[95i!FT{OVZZݻÄܹE9۷mnL=fdpTxQҢX?4r@6q#Ȩϭ[YwO?v|:bh& yXII><ȧkhɓ ''$KsСFkyɼ(&bg\ѣ#cOָ5^9_#\[WG׮흜>=qZX臅M>*Jy3SMPYfvwѪU.]Y[_ϟֿDC[6eVPPa*a4i g/_nS67ܱ<=gN2=,"b:嗖/hի&ySڳfKuDɤ\@{Wѣkh L@ x@ݸi0xӯ2;^WiFIRvr*k9-]:6W.^Ö,ZZa5z8ɓx0 S={[?0pbdFhaTet'!(33fΜxXt7[KKM<{vsLUɓe yKu%snݺ{_kX< 0 SȈ8P{T{Ҭ}[C[~uooAZssu2*;.__˗w!%%Rî\Ò5lhsܿx6vvW̉HaԚCN70x!/aFԿ~}Ew< !aFn}}u;\C@0 _@u~w4iJgWM0oWZ~? ׈g K?|r^>_7t3tݺ}ԣGjK$;~PF ?lޚ5}ԦaA޿x%t ;QN4(9q893v.\~8:\Wrmib;1_ $%%Nܹ\}TWev j𔅅~Ӧ>=QZ>әL"#7n8rG?DG;4g6oСFT2၁;wVgv:~}m[,[6ŠfR y.k6ܹUAFF};xN[jGyX-Sx2UƀT%Ui:Pz`z†Mt Wo}a|&'OpLtC44܆f͚r&?<) 124UZ$(-Rp:u~1Tپ}kiFQsrVaҮ]+*'&[~4d֭,R?z`hڵiS.df0BE go_{yɐY[%m = ri^NKk8y2UƀT%Ui:Pz h{l= Ђ !C ‡DXsd`_go/.M"ʊ{ U޽۠Asz\rM* /_MZZ] 4K}4f,]_TOɓ킃={ $*)ɜf;9]2+.)\X=qзr%o_/KH{Aŋ;V~}L֕-&Q/԰aCd(3ɲ/&|oKVV5;R밉o/R,=:" -)uZ e6+okD55%Ui:Pz;}\OָK |{t~Ktʱ{/( إ͛lm 7ݽ[Zn<·`J+73~z0͛Vn~&5;{Ik2}*ss 1b&\ԩC'thoyx"9%1ر  Džv6iѢL{y25PatW@="d_BKOǸnp_hD0eΝ[vQ…\ vV)S34߫WgWXSβe3ئLIrVV\>7$!(S85z-WӅ0"26ln"΅MOgӦ^K˦M޽55j@k(0EaTj3Ƃ}?r o3v۶P^{$Gm?x!/aF> f;wr׮<\m7ѧL0B^*8Z\ 3a,G]E?}zb8+ss}Moi{]V Ir%K?nݷp^^Vٓ&_,Yʕ=O aT9S~.fg[PG%dfX[SGxFFbbmi 9<ȿ{7~'ۍ9#996lf3sΜKjeM;礧דԺt\]L nȘ0avx^=kg'X`-/>u=e~yusN#k[7?:ڛZvp3:Ԉ+u&kP0M)M\"C"B"B`ƕ*yiΆh~LO_v-,&O ͳ۷o-}>\ݧς!W*%bIưz\$Wpt$v`:kSAxŋ;<(y ;_;77r(3>~vFF [S&rĉ#d;yŋ,_d|Hbb[#xJITa*|װk"BQ6%KFF5Bo߫Wg ӁyشirrVppZRAAeo&I۝\۽{ )ՏmNC7ndxzڐ l@pƫ~/s_M#%LMΘil{{)RGoү*< ȟgGVP9Ja^CUhT :{vsLUɓk'LJĒȺ,HY=;h9b5{;Kl4?33fΜz<% JnnýF!lwo+A< ¨ԯӁyݻFmncc;Nrފ<ʕ=72yT{__G;p6[!6Xd*ddP%%ۭ`mRR"y(/ ObxqqhO5biٕ;eV͟>=!lwo-ݯU0 SROa!K;¿T~ x@/tSXw%%_Pa0>y0EaTLO0B^*[U~ȧ:P%%%o/}=E0B^@ҿIIIbDyZQ0B^@4k֬cǎEEEbځ!$??=j@ x(rX*7kLT;0B^@H_UxOO88^ݻwbÆU2;W&m׮;xQG(2a0øM0R1ǣa/_ TKJr%<ioe6#ksE< Fll,0vϾHQUa7ndZXJK עm<gkkjl̙dvƍcXPy,Gڥo_'Oխt2=lٲT_mbҗ#ϸqVԴoQQ2 y3f8P͜9ɨ>0p",nlѢ٭[YT# x( mm|Ҳ`*aHoLٴ)0++nlUcZ#TŒj Hff1Ucȑ-Q]WSyI:vx = IZZR/^_:^,(BB<ѣXu"RA++xu2!O]Kv6iiQdBd;PhiuIJZD:2||ZZT7%>~6ӑӹ-$?K緵lٌGf;xXhŋ]~~N+WI۷wwqNޠG(2a\]]E2U<zXiuQçyH%znȨϥK45;ݺt$$sɒ\aTtë44ԽFl#aZ< v:9Iݻ\;KNsE< mjj"?S ^y=8ܹDjҾ}k2!Ot$.n֤ICAE:B"y߲HV-ЮkҤ;aW;~}uIʤ )-TڻGy:$[ɓHH><ҥK;ʜ;יNĤ/t;(/ꂴO3pT'.P"HTZ4?? 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Schmidt and Charles D. Cranor - Half Sync/Half Async](http://www.cs.wustl.edu/~schmidt/PDF/PLoP-95.pdf) * [Pattern Oriented Software Architecture Vol I-V](http://www.amazon.com/Pattern-Oriented-Software-Architecture-Volume-Patterns/dp/0471958697) java-design-patterns-1.9.0/half-sync-half-async/pom.xml000066400000000000000000000014031264154357600230060ustar00rootroot00000000000000 4.0.0 com.iluwatar java-design-patterns 1.9.0 half-sync-half-async junit junit test org.mockito mockito-core test java-design-patterns-1.9.0/half-sync-half-async/src/000077500000000000000000000000001264154357600222625ustar00rootroot00000000000000java-design-patterns-1.9.0/half-sync-half-async/src/main/000077500000000000000000000000001264154357600232065ustar00rootroot00000000000000java-design-patterns-1.9.0/half-sync-half-async/src/main/java/000077500000000000000000000000001264154357600241275ustar00rootroot00000000000000java-design-patterns-1.9.0/half-sync-half-async/src/main/java/com/000077500000000000000000000000001264154357600247055ustar00rootroot00000000000000java-design-patterns-1.9.0/half-sync-half-async/src/main/java/com/iluwatar/000077500000000000000000000000001264154357600265355ustar00rootroot00000000000000java-design-patterns-1.9.0/half-sync-half-async/src/main/java/com/iluwatar/halfsynchalfasync/000077500000000000000000000000001264154357600322355ustar00rootroot00000000000000App.java000066400000000000000000000111511264154357600335400ustar00rootroot00000000000000java-design-patterns-1.9.0/half-sync-half-async/src/main/java/com/iluwatar/halfsynchalfasyncpackage com.iluwatar.halfsynchalfasync; import java.util.concurrent.LinkedBlockingQueue; /** * * This application demonstrates Half-Sync/Half-Async pattern. Key parts of the pattern are * {@link AsyncTask} and {@link AsynchronousService}. * *

* PROBLEM
* A concurrent system have a mixture of short duration, mid duration and long duration tasks. Mid * or long duration tasks should be performed asynchronously to meet quality of service * requirements. * *

* INTENT
* The intent of this pattern is to separate the the synchronous and asynchronous processing in the * concurrent application by introducing two intercommunicating layers - one for sync and one for * async. This simplifies the programming without unduly affecting the performance. * *

* APPLICABILITY
* UNIX network subsystems - In operating systems network operations are carried out * asynchronously with help of hardware level interrupts.
* CORBA - At the asynchronous layer one thread is associated with each socket that is connected * to the client. Thread blocks waiting for CORBA requests from the client. On receiving request it * is inserted in the queuing layer which is then picked up by synchronous layer which processes the * request and sends response back to the client.
* Android AsyncTask framework - Framework provides a way to execute long running blocking * calls, such as downloading a file, in background threads so that the UI thread remains free to * respond to user inputs.
* *

* IMPLEMENTATION
* The main method creates an asynchronous service which does not block the main thread while the * task is being performed. The main thread continues its work which is similar to Async Method * Invocation pattern. The difference between them is that there is a queuing layer between * Asynchronous layer and synchronous layer, which allows for different communication patterns * between both layers. Such as Priority Queue can be used as queuing layer to prioritize the way * tasks are executed. Our implementation is just one simple way of implementing this pattern, there * are many variants possible as described in its applications. * */ public class App { /** * Program entry point * * @param args command line args */ public static void main(String[] args) { AsynchronousService service = new AsynchronousService(new LinkedBlockingQueue<>()); /* * A new task to calculate sum is received but as this is main thread, it should not block. So * it passes it to the asynchronous task layer to compute and proceeds with handling other * incoming requests. This is particularly useful when main thread is waiting on Socket to * receive new incoming requests and does not wait for particular request to be completed before * responding to new request. */ service.execute(new ArithmeticSumTask(1000)); /* * New task received, lets pass that to async layer for computation. So both requests will be * executed in parallel. */ service.execute(new ArithmeticSumTask(500)); service.execute(new ArithmeticSumTask(2000)); service.execute(new ArithmeticSumTask(1)); } /** * * ArithmeticSumTask * */ static class ArithmeticSumTask implements AsyncTask { private long n; public ArithmeticSumTask(long n) { this.n = n; } /* * This is the long running task that is performed in background. In our example the long * running task is calculating arithmetic sum with artificial delay. */ @Override public Long call() throws Exception { return ap(n); } /* * This will be called in context of the main thread where some validations can be done * regarding the inputs. Such as it must be greater than 0. It's a small computation which can * be performed in main thread. If we did validated the input in background thread then we pay * the cost of context switching which is much more than validating it in main thread. */ @Override public void onPreCall() { if (n < 0) { throw new IllegalArgumentException("n is less than 0"); } } @Override public void onPostCall(Long result) { // Handle the result of computation System.out.println(result); } @Override public void onError(Throwable throwable) { throw new IllegalStateException("Should not occur"); } } private static long ap(long i) { try { Thread.sleep(i); } catch (InterruptedException e) { System.out.println(e); } return (i) * (i + 1) / 2; } } AsyncTask.java000066400000000000000000000031441264154357600347230ustar00rootroot00000000000000java-design-patterns-1.9.0/half-sync-half-async/src/main/java/com/iluwatar/halfsynchalfasyncpackage com.iluwatar.halfsynchalfasync; import java.util.concurrent.Callable; /** * Represents some computation that is performed asynchronously and its result. The computation is * typically done is background threads and the result is posted back in form of callback. The * callback does not implement {@code isComplete}, {@code cancel} as it is out of scope of this * pattern. * * @param type of result */ public interface AsyncTask extends Callable { /** * Is called in context of caller thread before call to {@link #call()}. Large tasks should not be * performed in this method as it will block the caller thread. Small tasks such as validations * can be performed here so that the performance penalty of context switching is not incurred in * case of invalid requests. */ void onPreCall(); /** * A callback called after the result is successfully computed by {@link #call()}. In our * implementation this method is called in context of background thread but in some variants, such * as Android where only UI thread can change the state of UI widgets, this method is called in * context of UI thread. */ void onPostCall(O result); /** * A callback called if computing the task resulted in some exception. This method is called when * either of {@link #call()} or {@link #onPreCall()} throw any exception. * * @param throwable error cause */ void onError(Throwable throwable); /** * This is where the computation of task should reside. This method is called in context of * background thread. */ @Override O call() throws Exception; } AsynchronousService.java000066400000000000000000000060041264154357600370350ustar00rootroot00000000000000java-design-patterns-1.9.0/half-sync-half-async/src/main/java/com/iluwatar/halfsynchalfasyncpackage com.iluwatar.halfsynchalfasync; import java.util.concurrent.BlockingQueue; import java.util.concurrent.ExecutionException; import java.util.concurrent.ExecutorService; import java.util.concurrent.FutureTask; import java.util.concurrent.ThreadPoolExecutor; import java.util.concurrent.TimeUnit; /** * This is the asynchronous layer which does not block when a new request arrives. It just passes * the request to the synchronous layer which consists of a queue i.e. a {@link BlockingQueue} and a * pool of threads i.e. {@link ThreadPoolExecutor}. Out of this pool of worker threads one of the * thread picks up the task and executes it synchronously in background and the result is posted * back to the caller via callback. */ public class AsynchronousService { /* * This represents the queuing layer as well as synchronous layer of the pattern. The thread pool * contains worker threads which execute the tasks in blocking/synchronous manner. Long running * tasks should be performed in the background which does not affect the performance of main * thread. */ private ExecutorService service; /** * Creates an asynchronous service using {@code workQueue} as communication channel between * asynchronous layer and synchronous layer. Different types of queues such as Priority queue, can * be used to control the pattern of communication between the layers. */ public AsynchronousService(BlockingQueue workQueue) { service = new ThreadPoolExecutor(10, 10, 10, TimeUnit.SECONDS, workQueue); } /** * A non-blocking method which performs the task provided in background and returns immediately. *

* On successful completion of task the result is posted back using callback method * {@link AsyncTask#onPostCall(Object)}, if task execution is unable to complete normally due to * some exception then the reason for error is posted back using callback method * {@link AsyncTask#onError(Throwable)}. *

* NOTE: The results are posted back in the context of background thread in this implementation. */ public void execute(final AsyncTask task) { try { // some small tasks such as validation can be performed here. task.onPreCall(); } catch (Exception e) { task.onError(e); return; } service.submit(new FutureTask(task) { @Override protected void done() { super.done(); try { /* * called in context of background thread. There is other variant possible where result is * posted back and sits in the queue of caller thread which then picks it up for * processing. An example of such a system is Android OS, where the UI elements can only * be updated using UI thread. So result must be posted back in UI thread. */ task.onPostCall(get()); } catch (InterruptedException e) { // should not occur } catch (ExecutionException e) { task.onError(e.getCause()); } } }); } } java-design-patterns-1.9.0/half-sync-half-async/src/test/000077500000000000000000000000001264154357600232415ustar00rootroot00000000000000java-design-patterns-1.9.0/half-sync-half-async/src/test/java/000077500000000000000000000000001264154357600241625ustar00rootroot00000000000000java-design-patterns-1.9.0/half-sync-half-async/src/test/java/com/000077500000000000000000000000001264154357600247405ustar00rootroot00000000000000java-design-patterns-1.9.0/half-sync-half-async/src/test/java/com/iluwatar/000077500000000000000000000000001264154357600265705ustar00rootroot00000000000000java-design-patterns-1.9.0/half-sync-half-async/src/test/java/com/iluwatar/halfsynchalfasync/000077500000000000000000000000001264154357600322705ustar00rootroot00000000000000AppTest.java000066400000000000000000000004261264154357600344360ustar00rootroot00000000000000java-design-patterns-1.9.0/half-sync-half-async/src/test/java/com/iluwatar/halfsynchalfasyncpackage com.iluwatar.halfsynchalfasync; import java.util.concurrent.ExecutionException; import org.junit.Test; /** * * Application test * */ public class AppTest { @Test public void test() throws InterruptedException, ExecutionException { App.main(null); } } AsynchronousServiceTest.java000066400000000000000000000042451264154357600377350ustar00rootroot00000000000000java-design-patterns-1.9.0/half-sync-half-async/src/test/java/com/iluwatar/halfsynchalfasyncpackage com.iluwatar.halfsynchalfasync; import org.junit.Test; import org.mockito.InOrder; import java.io.IOException; import java.util.concurrent.LinkedBlockingQueue; import static org.mockito.Matchers.eq; import static org.mockito.Mockito.*; /** * Date: 12/12/15 - 11:15 PM * * @author Jeroen Meulemeester */ public class AsynchronousServiceTest { @Test public void testPerfectExecution() throws Exception { final AsynchronousService service = new AsynchronousService(new LinkedBlockingQueue<>()); final AsyncTask task = mock(AsyncTask.class); final Object result = new Object(); when(task.call()).thenReturn(result); service.execute(task); verify(task, timeout(2000)).onPostCall(eq(result)); final InOrder inOrder = inOrder(task); inOrder.verify(task, times(1)).onPreCall(); inOrder.verify(task, times(1)).call(); inOrder.verify(task, times(1)).onPostCall(eq(result)); verifyNoMoreInteractions(task); } @Test public void testCallException() throws Exception { final AsynchronousService service = new AsynchronousService(new LinkedBlockingQueue<>()); final AsyncTask task = mock(AsyncTask.class); final IOException exception = new IOException(); when(task.call()).thenThrow(exception); service.execute(task); verify(task, timeout(2000)).onError(eq(exception)); final InOrder inOrder = inOrder(task); inOrder.verify(task, times(1)).onPreCall(); inOrder.verify(task, times(1)).call(); inOrder.verify(task, times(1)).onError(exception); verifyNoMoreInteractions(task); } @Test public void testPreCallException() throws Exception { final AsynchronousService service = new AsynchronousService(new LinkedBlockingQueue<>()); final AsyncTask task = mock(AsyncTask.class); final IllegalStateException exception = new IllegalStateException(); doThrow(exception).when(task).onPreCall(); service.execute(task); verify(task, timeout(2000)).onError(eq(exception)); final InOrder inOrder = inOrder(task); inOrder.verify(task, times(1)).onPreCall(); inOrder.verify(task, times(1)).onError(exception); verifyNoMoreInteractions(task); } }java-design-patterns-1.9.0/intercepting-filter/000077500000000000000000000000001264154357600215425ustar00rootroot00000000000000java-design-patterns-1.9.0/intercepting-filter/etc/000077500000000000000000000000001264154357600223155ustar00rootroot00000000000000java-design-patterns-1.9.0/intercepting-filter/etc/intercepting-filter.png000066400000000000000000002231271264154357600270100ustar00rootroot00000000000000PNG  IHDRbĢ&IDATxmWwaA چAVdn Q2{%CamZzyWbe#CM(ɝ%KY-YZ2k'EPH"]98M o7Xl~STSUQ^N5sz @5_@!М8_z^s=FB_hE'Ӓ fJR`9PE~ fJR`9PE~ fJR`9PE~ fJR`9PE~ f^j8s[sE~ #֢"3Q ?x LE~ #֢"fBAؠ|mV0(y? 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TL_ */%bon4K|L4^#kM8vRvvJkVq$\4=ã_" P7#y_bY>v^k6jU֗Ӭ5;:i/%:OB ,^nIZуh'h;_` _tã,;_@|g/8/Cf~6NiC7bP<Sv x՚4Z@L~q#vgm)^kٲogOZ> ٗ|svS\iwdiƠU0pΞ7qގ4 !,/ݶxn [C2sw@GIl5tn.K[v_li7=+G5n~F!cߝ,e,0niN*ؗTlw'0sHO7zK_@aNϼvg-uΊbrcO]9@&헻aoK ,W-+Kކ@ΕzG^$) 7V*O_|qߥ /bKOmJF*#H&Dw(~ѭC!"seupRS yF~a'/>r^9}ӏ|Z,_+-mvYH_mw_Rv%P 7窛;L:f / GX~!=7>ykμ,C6(N2E)ɽ3/2DB/g&pT\YfCS .S8_@vDB^yT7X6}wLxOtmr&.>PK*Z?C8WNݹR ob$N:#ϛvF~!DgYX}rK"ӡ:4UG_ N삱g9`_ */SB~) pJuMt\J~E!POIENDB`java-design-patterns-1.9.0/intercepting-filter/etc/intercepting-filter.ucls000066400000000000000000000323101264154357600271620ustar00rootroot00000000000000 java-design-patterns-1.9.0/intercepting-filter/index.md000066400000000000000000000020751264154357600231770ustar00rootroot00000000000000--- layout: pattern title: Intercepting Filter folder: intercepting-filter permalink: /patterns/intercepting-filter/ categories: Behavioral tags: - Java - Difficulty-Intermediate --- **Intent:** Provide pluggable filters to conduct necessary pre-processing and post-processing to requests from a client to a target ![alt text](./etc/intercepting-filter.png "Intercepting Filter") **Applicability:** Use the Intercepting Filter pattern when * a system uses pre-processing or post-processing requests * a system should do the authentication/ authorization/ logging or tracking of request and then pass the requests to corresponding handlers * you want a modular approach to configuring pre-processing and post-processing schemes **Real world examples:** * [Struts 2 - Interceptors](https://struts.apache.org/docs/interceptors.html) **Credits:** * [TutorialsPoint - Intercepting Filter](http://www.tutorialspoint.com/design_pattern/intercepting_filter_pattern.htm) * [Presentation Tier Patterns](http://www.javagyan.com/tutorials/corej2eepatterns/presentation-tier-patterns) java-design-patterns-1.9.0/intercepting-filter/pom.xml000066400000000000000000000014021264154357600230540ustar00rootroot00000000000000 4.0.0 com.iluwatar java-design-patterns 1.9.0 intercepting-filter junit junit test org.mockito mockito-core test java-design-patterns-1.9.0/intercepting-filter/src/000077500000000000000000000000001264154357600223315ustar00rootroot00000000000000java-design-patterns-1.9.0/intercepting-filter/src/main/000077500000000000000000000000001264154357600232555ustar00rootroot00000000000000java-design-patterns-1.9.0/intercepting-filter/src/main/java/000077500000000000000000000000001264154357600241765ustar00rootroot00000000000000java-design-patterns-1.9.0/intercepting-filter/src/main/java/com/000077500000000000000000000000001264154357600247545ustar00rootroot00000000000000java-design-patterns-1.9.0/intercepting-filter/src/main/java/com/iluwatar/000077500000000000000000000000001264154357600266045ustar00rootroot00000000000000java-design-patterns-1.9.0/intercepting-filter/src/main/java/com/iluwatar/intercepting/000077500000000000000000000000001264154357600312775ustar00rootroot00000000000000java-design-patterns-1.9.0/intercepting-filter/src/main/java/com/iluwatar/intercepting/filter/000077500000000000000000000000001264154357600325645ustar00rootroot00000000000000AbstractFilter.java000066400000000000000000000013731264154357600362650ustar00rootroot00000000000000java-design-patterns-1.9.0/intercepting-filter/src/main/java/com/iluwatar/intercepting/filterpackage com.iluwatar.intercepting.filter; /** * Base class for order processing filters. Handles chain management. * */ public abstract class AbstractFilter implements Filter { private Filter next; public AbstractFilter() {} public AbstractFilter(Filter next) { this.next = next; } @Override public void setNext(Filter filter) { this.next = filter; } @Override public Filter getNext() { return next; } @Override public Filter getLast() { Filter last = this; while (last.getNext() != null) { last = last.getNext(); } return last; } @Override public String execute(Order order) { if (getNext() != null) { return getNext().execute(order); } else { return ""; } } } AddressFilter.java000066400000000000000000000007751264154357600361140ustar00rootroot00000000000000java-design-patterns-1.9.0/intercepting-filter/src/main/java/com/iluwatar/intercepting/filterpackage com.iluwatar.intercepting.filter; /** * Concrete implementation of filter This filter is responsible for checking/filtering the input in * the address field. * * @author joshzambales * */ public class AddressFilter extends AbstractFilter { @Override public String execute(Order order) { String result = super.execute(order); if (order.getAddress() == null || order.getAddress().isEmpty()) { return result + "Invalid address! "; } else { return result; } } } App.java000066400000000000000000000040201264154357600340640ustar00rootroot00000000000000java-design-patterns-1.9.0/intercepting-filter/src/main/java/com/iluwatar/intercepting/filterpackage com.iluwatar.intercepting.filter; /** * * When a request enters a Web application, it often must pass several entrance tests prior to the * main processing stage. For example, - Has the client been authenticated? - Does the client have a * valid session? - Is the client's IP address from a trusted network? - Does the request path * violate any constraints? - What encoding does the client use to send the data? - Do we support * the browser type of the client? Some of these checks are tests, resulting in a yes or no answer * that determines whether processing will continue. Other checks manipulate the incoming data * stream into a form suitable for processing. *

* The classic solution consists of a series of conditional checks, with any failed check aborting * the request. Nested if/else statements are a standard strategy, but this solution leads to code * fragility and a copy-and-paste style of programming, because the flow of the filtering and the * action of the filters is compiled into the application. *

* The key to solving this problem in a flexible and unobtrusive manner is to have a simple * mechanism for adding and removing processing components, in which each component completes a * specific filtering action. This is the Intercepting Filter pattern in action. *

* In this example we check whether the order request is valid through pre-processing done via * {@link Filter}. Each field has its own corresponding {@link Filter} *

* * @author joshzambales * */ public class App { /** * Program entry point * * @param args command line args */ public static void main(String[] args) { FilterManager filterManager = new FilterManager(); filterManager.addFilter(new NameFilter()); filterManager.addFilter(new ContactFilter()); filterManager.addFilter(new AddressFilter()); filterManager.addFilter(new DepositFilter()); filterManager.addFilter(new OrderFilter()); Client client = new Client(); client.setFilterManager(filterManager); } } Client.java000066400000000000000000000060221264154357600345660ustar00rootroot00000000000000java-design-patterns-1.9.0/intercepting-filter/src/main/java/com/iluwatar/intercepting/filterpackage com.iluwatar.intercepting.filter; import java.awt.BorderLayout; import java.awt.GridLayout; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JPanel; import javax.swing.JRootPane; import javax.swing.JTextArea; import javax.swing.JTextField; import javax.swing.SwingUtilities; /** * The Client class is responsible for handling the input and running them through filters inside * the {@link FilterManager}. * * This is where {@link Filter}s come to play as the client pre-processes the request before being * displayed in the {@link Target}. * * @author joshzambales * */ public class Client extends JFrame { private static final long serialVersionUID = 1L; private FilterManager filterManager; private JLabel jl; private JTextField[] jtFields; private JTextArea[] jtAreas; private JButton clearButton; private JButton processButton; /** * Constructor */ public Client() { super("Client System"); setDefaultCloseOperation(EXIT_ON_CLOSE); setSize(300, 300); jl = new JLabel("RUNNING..."); jtFields = new JTextField[3]; for (int i = 0; i < 3; i++) { jtFields[i] = new JTextField(); } jtAreas = new JTextArea[2]; for (int i = 0; i < 2; i++) { jtAreas[i] = new JTextArea(); } clearButton = new JButton("Clear"); processButton = new JButton("Process"); setup(); } private void setup() { setLayout(new BorderLayout()); JPanel panel = new JPanel(); add(jl, BorderLayout.SOUTH); add(panel, BorderLayout.CENTER); panel.setLayout(new GridLayout(6, 2)); panel.add(new JLabel("Name")); panel.add(jtFields[0]); panel.add(new JLabel("Contact Number")); panel.add(jtFields[1]); panel.add(new JLabel("Address")); panel.add(jtAreas[0]); panel.add(new JLabel("Deposit Number")); panel.add(jtFields[2]); panel.add(new JLabel("Order")); panel.add(jtAreas[1]); panel.add(clearButton); panel.add(processButton); clearButton.addActionListener(new ActionListener() { @Override public void actionPerformed(ActionEvent e) { for (JTextArea i : jtAreas) { i.setText(""); } for (JTextField i : jtFields) { i.setText(""); } } }); processButton.addActionListener(new ActionListener() { @Override public void actionPerformed(ActionEvent e) { Order order = new Order(jtFields[0].getText(), jtFields[1].getText(), jtAreas[0].getText(), jtFields[2].getText(), jtAreas[1].getText()); jl.setText(sendRequest(order)); } }); JRootPane rootPane = SwingUtilities.getRootPane(processButton); rootPane.setDefaultButton(processButton); setVisible(true); } public void setFilterManager(FilterManager filterManager) { this.filterManager = filterManager; } public String sendRequest(Order order) { return filterManager.filterRequest(order); } } ContactFilter.java000066400000000000000000000013251264154357600361120ustar00rootroot00000000000000java-design-patterns-1.9.0/intercepting-filter/src/main/java/com/iluwatar/intercepting/filterpackage com.iluwatar.intercepting.filter; /** * Concrete implementation of filter This filter checks for the contact field in which it checks if * the input consist of numbers and it also checks if the input follows the length constraint (11 * digits) * * @author joshzambales * */ public class ContactFilter extends AbstractFilter { @Override public String execute(Order order) { String result = super.execute(order); if (order.getContactNumber() == null || order.getContactNumber().isEmpty() || order.getContactNumber().matches(".*[^\\d]+.*") || order.getContactNumber().length() != 11) { return result + "Invalid contact number! "; } else { return result; } } } DepositFilter.java000066400000000000000000000007341264154357600361310ustar00rootroot00000000000000java-design-patterns-1.9.0/intercepting-filter/src/main/java/com/iluwatar/intercepting/filterpackage com.iluwatar.intercepting.filter; /** * Concrete implementation of filter This checks for the deposit code * * @author joshzambales * */ public class DepositFilter extends AbstractFilter { @Override public String execute(Order order) { String result = super.execute(order); if (order.getDepositNumber() == null || order.getDepositNumber().isEmpty()) { return result + "Invalid deposit number! "; } else { return result; } } } Filter.java000066400000000000000000000011461264154357600345770ustar00rootroot00000000000000java-design-patterns-1.9.0/intercepting-filter/src/main/java/com/iluwatar/intercepting/filterpackage com.iluwatar.intercepting.filter; /** * Filters perform certain tasks prior or after execution of request by request handler. In this * case, before the request is handled by the target, the request undergoes through each Filter * * @author joshzambales * */ public interface Filter { /** * Execute order processing filter. */ String execute(Order order); /** * Set next filter in chain after this. */ void setNext(Filter filter); /** * Get next filter in chain after this. */ Filter getNext(); /** * Get last filter in the chain. */ Filter getLast(); } FilterChain.java000066400000000000000000000012171264154357600355410ustar00rootroot00000000000000java-design-patterns-1.9.0/intercepting-filter/src/main/java/com/iluwatar/intercepting/filterpackage com.iluwatar.intercepting.filter; /** * Filter Chain carries multiple filters and help to execute them in defined order on target. * * @author joshzambales */ public class FilterChain { private Filter chain; /** * Constructor */ public FilterChain() { } /** * Adds filter */ public void addFilter(Filter filter) { if (chain == null) { chain = filter; } else { chain.getLast().setNext(filter); } } /** * Execute filter chain */ public String execute(Order order) { if (chain != null) { return chain.execute(order); } else { return "RUNNING..."; } } } FilterManager.java000066400000000000000000000007031264154357600360700ustar00rootroot00000000000000java-design-patterns-1.9.0/intercepting-filter/src/main/java/com/iluwatar/intercepting/filterpackage com.iluwatar.intercepting.filter; /** * Filter Manager manages the filters and {@link FilterChain}. * * @author joshzambales * */ public class FilterManager { private FilterChain filterChain; public FilterManager() { filterChain = new FilterChain(); } public void addFilter(Filter filter) { filterChain.addFilter(filter); } public String filterRequest(Order order) { return filterChain.execute(order); } } NameFilter.java000066400000000000000000000010411264154357600353720ustar00rootroot00000000000000java-design-patterns-1.9.0/intercepting-filter/src/main/java/com/iluwatar/intercepting/filterpackage com.iluwatar.intercepting.filter; /** * Concrete implementation of filter. This filter checks if the input in the Name field is valid. * (alphanumeric) * * @author joshzambales * */ public class NameFilter extends AbstractFilter { @Override public String execute(Order order) { String result = super.execute(order); if (order.getName() == null || order.getName().isEmpty() || order.getName().matches(".*[^\\w|\\s]+.*")) { return result + "Invalid name! "; } else { return result; } } } Order.java000066400000000000000000000023651264154357600344310ustar00rootroot00000000000000java-design-patterns-1.9.0/intercepting-filter/src/main/java/com/iluwatar/intercepting/filterpackage com.iluwatar.intercepting.filter; /** * Order class carries the order data. * */ public class Order { private String name; private String contactNumber; private String address; private String depositNumber; private String order; public Order() {} /** * Constructor */ public Order(String name, String contactNumber, String address, String depositNumber, String order) { this.name = name; this.contactNumber = contactNumber; this.address = address; this.depositNumber = depositNumber; this.order = order; } public String getName() { return name; } public void setName(String name) { this.name = name; } public String getContactNumber() { return contactNumber; } public void setContactNumber(String contactNumber) { this.contactNumber = contactNumber; } public String getAddress() { return address; } public void setAddress(String address) { this.address = address; } public String getDepositNumber() { return depositNumber; } public void setDepositNumber(String depositNumber) { this.depositNumber = depositNumber; } public String getOrder() { return order; } public void setOrder(String order) { this.order = order; } } OrderFilter.java000066400000000000000000000007021264154357600355700ustar00rootroot00000000000000java-design-patterns-1.9.0/intercepting-filter/src/main/java/com/iluwatar/intercepting/filterpackage com.iluwatar.intercepting.filter; /** * Concrete implementation of filter. This checks for the order field. * * @author joshzambales * */ public class OrderFilter extends AbstractFilter { @Override public String execute(Order order) { String result = super.execute(order); if (order.getOrder() == null || order.getOrder().isEmpty()) { return result + "Invalid order! "; } else { return result; } } } Target.java000066400000000000000000000040571264154357600346040ustar00rootroot00000000000000java-design-patterns-1.9.0/intercepting-filter/src/main/java/com/iluwatar/intercepting/filterpackage com.iluwatar.intercepting.filter; import java.awt.BorderLayout; import java.awt.Dimension; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.JPanel; import javax.swing.JRootPane; import javax.swing.JScrollPane; import javax.swing.JTable; import javax.swing.SwingUtilities; import javax.swing.table.DefaultTableModel; /** * This is where the requests are displayed after being validated by filters. * * @author mjoshzambales * */ public class Target extends JFrame { private static final long serialVersionUID = 1L; private JTable jt; private JScrollPane jsp; private DefaultTableModel dtm; private JButton del; /** * Constructor */ public Target() { super("Order System"); setDefaultCloseOperation(EXIT_ON_CLOSE); setSize(640, 480); dtm = new DefaultTableModel(new Object[] {"Name", "Contact Number", "Address", "Deposit Number", "Order"}, 0); jt = new JTable(dtm); del = new JButton("Delete"); setup(); } private void setup() { setLayout(new BorderLayout()); JPanel bot = new JPanel(); add(jt.getTableHeader(), BorderLayout.NORTH); bot.setLayout(new BorderLayout()); bot.add(del, BorderLayout.EAST); add(bot, BorderLayout.SOUTH); jsp = new JScrollPane(jt); jsp.setPreferredSize(new Dimension(500, 250)); add(jsp, BorderLayout.CENTER); del.addActionListener(new DListener()); JRootPane rootPane = SwingUtilities.getRootPane(del); rootPane.setDefaultButton(del); setVisible(true); } public void execute(String[] request) { dtm.addRow(new Object[] {request[0], request[1], request[2], request[3], request[4]}); } class DListener implements ActionListener { @Override public void actionPerformed(ActionEvent e) { int temp = jt.getSelectedRow(); if (temp == -1) { return; } int temp2 = jt.getSelectedRowCount(); for (int i = 0; i < temp2; i++) { dtm.removeRow(temp); } } } } java-design-patterns-1.9.0/intercepting-filter/src/test/000077500000000000000000000000001264154357600233105ustar00rootroot00000000000000java-design-patterns-1.9.0/intercepting-filter/src/test/java/000077500000000000000000000000001264154357600242315ustar00rootroot00000000000000java-design-patterns-1.9.0/intercepting-filter/src/test/java/com/000077500000000000000000000000001264154357600250075ustar00rootroot00000000000000java-design-patterns-1.9.0/intercepting-filter/src/test/java/com/iluwatar/000077500000000000000000000000001264154357600266375ustar00rootroot00000000000000java-design-patterns-1.9.0/intercepting-filter/src/test/java/com/iluwatar/intercepting/000077500000000000000000000000001264154357600313325ustar00rootroot00000000000000java-design-patterns-1.9.0/intercepting-filter/src/test/java/com/iluwatar/intercepting/filter/000077500000000000000000000000001264154357600326175ustar00rootroot00000000000000AppTest.java000066400000000000000000000003201264154357600347560ustar00rootroot00000000000000java-design-patterns-1.9.0/intercepting-filter/src/test/java/com/iluwatar/intercepting/filterpackage com.iluwatar.intercepting.filter; import org.junit.Test; /** * * Application test. * */ public class AppTest { @Test public void test() { String[] args = {}; App.main(args); } } FilterManagerTest.java000066400000000000000000000024731264154357600367710ustar00rootroot00000000000000java-design-patterns-1.9.0/intercepting-filter/src/test/java/com/iluwatar/intercepting/filterpackage com.iluwatar.intercepting.filter; import org.junit.Test; import static org.junit.Assert.assertEquals; import static org.mockito.Matchers.any; import static org.mockito.Mockito.mock; import static org.mockito.Mockito.times; import static org.mockito.Mockito.verify; import static org.mockito.Mockito.verifyZeroInteractions; import static org.mockito.Mockito.when; /** * Date: 12/13/15 - 3:01 PM * * @author Jeroen Meulemeester */ public class FilterManagerTest { @Test public void testFilterRequest() throws Exception { final Target target = mock(Target.class); final FilterManager filterManager = new FilterManager(); assertEquals("RUNNING...", filterManager.filterRequest(mock(Order.class))); verifyZeroInteractions(target); } @Test public void testAddFilter() throws Exception { final Target target = mock(Target.class); final FilterManager filterManager = new FilterManager(); verifyZeroInteractions(target); final Filter filter = mock(Filter.class); when(filter.execute(any(Order.class))).thenReturn("filter"); filterManager.addFilter(filter); final Order order = mock(Order.class); assertEquals("filter", filterManager.filterRequest(order)); verify(filter, times(1)).execute(any(Order.class)); verifyZeroInteractions(target, filter, order); } }FilterTest.java000066400000000000000000000077751264154357600355100ustar00rootroot00000000000000java-design-patterns-1.9.0/intercepting-filter/src/test/java/com/iluwatar/intercepting/filterpackage com.iluwatar.intercepting.filter; import org.junit.Test; import org.junit.runner.RunWith; import org.junit.runners.Parameterized; import org.junit.runners.Parameterized.Parameters; import java.util.ArrayList; import java.util.List; import static junit.framework.TestCase.assertSame; import static org.junit.Assert.assertEquals; import static org.junit.Assert.assertNotNull; import static org.junit.Assert.assertNull; /** * Date: 12/13/15 - 2:17 PM * * @author Jeroen Meulemeester */ @RunWith(Parameterized.class) public class FilterTest { private static final Order PERFECT_ORDER = new Order("name", "12345678901", "addr", "dep", "order"); private static final Order WRONG_ORDER = new Order("name", "12345678901", "addr", "dep", ""); private static final Order WRONG_DEPOSIT = new Order("name", "12345678901", "addr", "", "order"); private static final Order WRONG_ADDRESS = new Order("name", "12345678901", "", "dep", "order"); private static final Order WRONG_CONTACT = new Order("name", "", "addr", "dep", "order"); private static final Order WRONG_NAME = new Order("", "12345678901", "addr", "dep", "order"); @Parameters public static List getTestData() { final List testData = new ArrayList<>(); testData.add(new Object[]{new NameFilter(), PERFECT_ORDER, ""}); testData.add(new Object[]{new NameFilter(), WRONG_NAME, "Invalid name!"}); testData.add(new Object[]{new NameFilter(), WRONG_CONTACT, ""}); testData.add(new Object[]{new NameFilter(), WRONG_ADDRESS, ""}); testData.add(new Object[]{new NameFilter(), WRONG_DEPOSIT, ""}); testData.add(new Object[]{new NameFilter(), WRONG_ORDER, ""}); testData.add(new Object[]{new ContactFilter(), PERFECT_ORDER, ""}); testData.add(new Object[]{new ContactFilter(), WRONG_NAME, ""}); testData.add(new Object[]{new ContactFilter(), WRONG_CONTACT, "Invalid contact number!"}); testData.add(new Object[]{new ContactFilter(), WRONG_ADDRESS, ""}); testData.add(new Object[]{new ContactFilter(), WRONG_DEPOSIT, ""}); testData.add(new Object[]{new ContactFilter(), WRONG_ORDER, ""}); testData.add(new Object[]{new AddressFilter(), PERFECT_ORDER, ""}); testData.add(new Object[]{new AddressFilter(), WRONG_NAME, ""}); testData.add(new Object[]{new AddressFilter(), WRONG_CONTACT, ""}); testData.add(new Object[]{new AddressFilter(), WRONG_ADDRESS, "Invalid address!"}); testData.add(new Object[]{new AddressFilter(), WRONG_DEPOSIT, ""}); testData.add(new Object[]{new AddressFilter(), WRONG_ORDER, ""}); testData.add(new Object[]{new DepositFilter(), PERFECT_ORDER, ""}); testData.add(new Object[]{new DepositFilter(), WRONG_NAME, ""}); testData.add(new Object[]{new DepositFilter(), WRONG_CONTACT, ""}); testData.add(new Object[]{new DepositFilter(), WRONG_ADDRESS, ""}); testData.add(new Object[]{new DepositFilter(), WRONG_DEPOSIT, "Invalid deposit number!"}); testData.add(new Object[]{new DepositFilter(), WRONG_ORDER, ""}); testData.add(new Object[]{new OrderFilter(), PERFECT_ORDER, ""}); testData.add(new Object[]{new OrderFilter(), WRONG_NAME, ""}); testData.add(new Object[]{new OrderFilter(), WRONG_CONTACT, ""}); testData.add(new Object[]{new OrderFilter(), WRONG_ADDRESS, ""}); testData.add(new Object[]{new OrderFilter(), WRONG_DEPOSIT, ""}); testData.add(new Object[]{new OrderFilter(), WRONG_ORDER, "Invalid order!"}); return testData; } private final Filter filter; private final Order order; private final String result; /** * Constructor */ public FilterTest(Filter filter, Order order, String result) { this.filter = filter; this.order = order; this.result = result; } @Test public void testExecute() throws Exception { final String result = this.filter.execute(this.order); assertNotNull(result); assertEquals(this.result, result.trim()); } @Test public void testNext() throws Exception { assertNull(this.filter.getNext()); assertSame(this.filter, this.filter.getLast()); } } OrderTest.java000066400000000000000000000023401264154357600353150ustar00rootroot00000000000000java-design-patterns-1.9.0/intercepting-filter/src/test/java/com/iluwatar/intercepting/filterpackage com.iluwatar.intercepting.filter; import org.junit.Test; import static org.junit.Assert.assertEquals; /** * Date: 12/13/15 - 2:57 PM * * @author Jeroen Meulemeester */ public class OrderTest { private static final String EXPECTED_VALUE = "test"; @Test public void testSetName() throws Exception { final Order order = new Order(); order.setName(EXPECTED_VALUE); assertEquals(EXPECTED_VALUE, order.getName()); } @Test public void testSetContactNumber() throws Exception { final Order order = new Order(); order.setContactNumber(EXPECTED_VALUE); assertEquals(EXPECTED_VALUE, order.getContactNumber()); } @Test public void testSetAddress() throws Exception { final Order order = new Order(); order.setAddress(EXPECTED_VALUE); assertEquals(EXPECTED_VALUE, order.getAddress()); } @Test public void testSetDepositNumber() throws Exception { final Order order = new Order(); order.setDepositNumber(EXPECTED_VALUE); assertEquals(EXPECTED_VALUE, order.getDepositNumber()); } @Test public void testSetOrder() throws Exception { final Order order = new Order(); order.setOrder(EXPECTED_VALUE); assertEquals(EXPECTED_VALUE, order.getOrder()); } } java-design-patterns-1.9.0/interpreter/000077500000000000000000000000001264154357600201275ustar00rootroot00000000000000java-design-patterns-1.9.0/interpreter/etc/000077500000000000000000000000001264154357600207025ustar00rootroot00000000000000java-design-patterns-1.9.0/interpreter/etc/interpreter.png000066400000000000000000000646471264154357600237740ustar00rootroot00000000000000PNG  IHDR{/inIDATxop$W};HrR+W܇QL£'#086 C ^ǔ-6hױ)5I=yVck]f=Uv:&P KQEmț}OtL}>-ӧKjeg'q H&@%`8卭WBZR&BEDD(n!TE('Bu *ED8-[UQD.B% ljPnqB"r*Q8΢9_MOӣl5"TjP8V%5U \kֽh!T׭ADVC ǙQVm2//7jǛHB>}=eU("T]8ζ k)Y֫%غRCۋ62(RɤvQm/[FP%Tۈ-I&iL[P ]lI,yXT;9̺oN-)mGn"ڕrn%Bz6뷗p Jlo[ -qI56BEHa+ieR oGq2Hjͬ뷋p,<85b}K>FM-cs>n"hԮT欽n%Bz6뷗j8vP^&˭xL6˴ݎiM]IeUBܒDlp>.(VJYl5`;mI( ۏu65~ +d_\ E*bs Yk~ԛJI\&)qk>׭ P"r98+[UQD.B% ljPnqB"r*Q8NrBUPq"[\\J⺅PE"Tp-("D(n!TEw~_G?YeMB׭E`-P0ʫw{Ta#Y >eٰ3ai)z1]U0Ok3P qREfRjbv32"rREG]FBbd)E|d|ʿ~O>y{w:ʅ-J[3qF=E˪Ue[pBtsI%*u~FpR$//r748װFc\)V7.l]X%qX}L5\/S mL۽rp,:%k8NB2Xg?gOsD/p_~7)?xAy֧w/lTpANm4 Ze7~j0TgwM&"#nԫ)t[Υ:fsw身Uܪ֛k[4_Quc>0_ǩZ3~PYb()Cj'x+#"{ xt@%́ =GAu-|_{op~LG}N'lm_KK':0mA~$wfu(!T[R6u0lU[5[jMiwJ6 XRFv! ڠ:+0^þ.?p{G"YbW#bc^x@qϽi9.Um"ݠ>ըSoܗU0s H\ɭz.n¼`!U[5[je,ҪΚPRJSV ^#Ev!'A=GAurŏrQ.7^8!z굓Ϝ}n,MR Km8-Ւ5kZ}ͨFg )WYrwLqTWL %5g@""{ a)8B qWy.w~?[i?.;o\ J-(7[Vh"{/KUP `_C ٝ ~ ׭"T%"DMf>ӟ5>%{5T疲9SˍlMNLb+i:}՟$]{M}Qբ;rޚo6Sl(5yw>gtwr__nR*+݉$6Rm{8Nz%/XV:%5XޙBŚم3Uo-P_kg)4^kD9@/5;iRȑVD=ۅMb[mǩ~f\7gH3aiYeHM65WwDVӧfWF7#A׭^P%T{)"sf6ӽ_QDZz*n+Ck>AJ~b$X&K)MuW"T ^\&ٵjqrs|ݿ-so^ %wZ&JYJ m4qUB"r;Ilv80Jlcw7Ji: %Vå3ݴlWj6~İ~6)Kug"T B&٭|Un7.%TR6AjRh񂾥&o_)#m4]k9Yd*/0{&[JJDnw"6ͮT6(vRu $B+g"6 lj^%T*IjW"rQDl⺅PE"Tp-("D(n!TE('Bu *ED[kH,b+\Q:N2FM BPѪP^qB"r*Q8NrBUPq"[\\Jq T"D9Pnը)A"r*Q5Z+[UQD.B% ljPnqB"r*Q;έ];KW~<AnD"Tu{^K?}RJ?J\M""r*Q8N%?$z ]M|85 ~r᯴6ۑE("7:Ʋ^f.lnˆ-"UonvT'Ez8Vu+zRlM͢~WS$B!i5S[ĦSfMk1r?c:;t @%:{׏G/ʴ,l8WӹPw,{fp Xnl~3VObǩk1r?Zӹuܮ4Z0{781YJL)ߗ gߋį[ϩ5֔uٺښin$.!:lz8V>uia Wbw6?Ax:Y6:٣.lLb3-'|Kw֔맗P6\g#7YَqᑽϜ}qy)+uߗR Lhˢu)aͿɂRFC?ībiݫn׉ w WۃDNӤ3}hfU/D3E.=m:}ˇ]KY m_b>:1lbOV톾E{]GvG/43`ΖP[ǦKv.'f r?\: @mw;{ӳֽW^Y_J{o˛=ø6ݎOUcNOKWǥn9#l*s8Uns2l`Fn\\:pew|p}G^\8rjYؽ2-+/Nc:NRS=&2&/!?Z/>\ M SS]Ul΀FnL\:p2֕:]?~#?( 2ז햣m MPkT7pt\;ZNORwæ"5l*t8 VLl&F_ ;N"e5p6rYٖHw?YH '[M{o [ i]MCqζ^Zly:1?᤿\PQnkpB=¦z苘KXv?\hk r&ť'WJz]6GHk zz*C~ "!r?1hd@g)Zntx16p6SۚNg.p [L @9*+ =NelOJVm馂Ȳa5p܁mNxljP1⺅PE"Tp-("D(n!TE('Bu *ED8-[UQD.B%g/wDdL2 WU[ubSDnQ"rQ{g ics?DA1U.b ܂vANԉw3,ec#ȮaT5{"6Jۡ\Tr;~Ͼ~y&s1O奬 m*j^_8xV5sd+j U@vjWOϑa,x"6j+"E%*|C~ay)+Cw'iE' ewvfm~܄ualx"6j+"E%*[}RV6KJXɎ<9Erb.6R3-[&BmEDs|p}G^\8rjYؽ2-+C勍XK n,s Խ nKqiu㷯>r /۴/j}}Y{SVkIƏoIdukD\"܎St9qmnnQulT0-.."~T] #dukD(U܋/D.qQad죈MT=-rϝ;Tw111B"4 Il*{…ՙu"!_q*3r+DUT/"ٳv\YY rpljq"TENuܙ3g\҅D(pUQ]FJ1b1'N?E(p*O)R]v-..={E8-'BUT]__^]]pP7q"[8NXYYرcG^_ZZ:EHXr;+O> qh`܋/:ՙ###333kkkM:Vgj.˂K^g+'hTUIl-?r';ՙ "uNǜdAARLH%2ü} 08Mtw%|NfQnytok=Zvajl9l}y~SNРLIl(gZ\sϞ'=%rQU8g>鸼B1 ?H~(+}څL 0Dz1H0˦]XJh9)7F@Ilׅ /džslss7ZV"r\T97=P?tj2YTlwW*2YoP {30zcT n&:symv]64kO8pD.JT>ǹί<=l+奬 mPYI/gIq-[=ĺ.[&=%RKq5qLژ%rQ8o;pS {eZV6k{7O QG%RFrRo -bV[97wػszcqKm?EDskw]+z,6jŸljݳXU nb[Jd=NcT nmkccme徉;vƮ]-.ySR r\Tr;N> $@j"6QV;,-:ՙ.Y5'k4[D.*F8պ"4Pؘ͢sLŋ][;:3s;FG{vvLJq/^\YY!r qz; 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The basic idea is to have a class for each symbol (terminal or nonterminal) in a * specialized computer language. The syntax tree of a sentence in the language is an instance of * the composite pattern and is used to evaluate (interpret) the sentence for a client. *

* In this example we use the Interpreter pattern to break sentences into expressions ( * {@link Expression}) that can be evaluated and as a whole form the result. * */ public class App { /** * * Program entry point. *

* Expressions can be evaluated using prefix, infix or postfix notations This sample uses postfix, * where operator comes after the operands * * @param args command line args * */ public static void main(String[] args) { String tokenString = "4 3 2 - 1 + *"; Stack stack = new Stack<>(); String[] tokenList = tokenString.split(" "); for (String s : tokenList) { if (isOperator(s)) { Expression rightExpression = stack.pop(); Expression leftExpression = stack.pop(); System.out.println(String.format("popped from stack left: %d right: %d", leftExpression.interpret(), rightExpression.interpret())); Expression operator = getOperatorInstance(s, leftExpression, rightExpression); System.out.println(String.format("operator: %s", operator)); int result = operator.interpret(); NumberExpression resultExpression = new NumberExpression(result); stack.push(resultExpression); System.out.println(String.format("push result to stack: %d", resultExpression.interpret())); } else { Expression i = new NumberExpression(s); stack.push(i); System.out.println(String.format("push to stack: %d", i.interpret())); } } System.out.println(String.format("result: %d", stack.pop().interpret())); } public static boolean isOperator(String s) { return s.equals("+") || s.equals("-") || s.equals("*"); } /** * Get expression for string */ public static Expression getOperatorInstance(String s, Expression left, Expression right) { switch (s) { case "+": return new PlusExpression(left, right); case "-": return new MinusExpression(left, right); case "*": return new MultiplyExpression(left, right); default: return new MultiplyExpression(left, right); } } } java-design-patterns-1.9.0/interpreter/src/main/java/com/iluwatar/interpreter/Expression.java000066400000000000000000000002731264154357600325400ustar00rootroot00000000000000package com.iluwatar.interpreter; /** * * Expression * */ public abstract class Expression { public abstract int interpret(); @Override public abstract String toString(); } java-design-patterns-1.9.0/interpreter/src/main/java/com/iluwatar/interpreter/MinusExpression.java000066400000000000000000000010421264154357600335470ustar00rootroot00000000000000package com.iluwatar.interpreter; /** * * MinusExpression * */ public class MinusExpression extends Expression { private Expression leftExpression; private Expression rightExpression; public MinusExpression(Expression leftExpression, Expression rightExpression) { this.leftExpression = leftExpression; this.rightExpression = rightExpression; } @Override public int interpret() { return leftExpression.interpret() - rightExpression.interpret(); } @Override public String toString() { return "-"; } } MultiplyExpression.java000066400000000000000000000010531264154357600342160ustar00rootroot00000000000000java-design-patterns-1.9.0/interpreter/src/main/java/com/iluwatar/interpreterpackage com.iluwatar.interpreter; /** * * MultiplyExpression * */ public class MultiplyExpression extends Expression { private Expression leftExpression; private Expression rightExpression; public MultiplyExpression(Expression leftExpression, Expression rightExpression) { this.leftExpression = leftExpression; this.rightExpression = rightExpression; } @Override public int interpret() { return leftExpression.interpret() * rightExpression.interpret(); } @Override public String toString() { return "*"; } } java-design-patterns-1.9.0/interpreter/src/main/java/com/iluwatar/interpreter/NumberExpression.java000066400000000000000000000006551264154357600337150ustar00rootroot00000000000000package com.iluwatar.interpreter; /** * * NumberExpression * */ public class NumberExpression extends Expression { private int number; public NumberExpression(int number) { this.number = number; } public NumberExpression(String s) { this.number = Integer.parseInt(s); } @Override public int interpret() { return number; } @Override public String toString() { return "number"; } } java-design-patterns-1.9.0/interpreter/src/main/java/com/iluwatar/interpreter/PlusExpression.java000066400000000000000000000010361264154357600334020ustar00rootroot00000000000000package com.iluwatar.interpreter; /** * * PlusExpression * */ public class PlusExpression extends Expression { private Expression leftExpression; private Expression rightExpression; public PlusExpression(Expression leftExpression, Expression rightExpression) { this.leftExpression = leftExpression; this.rightExpression = rightExpression; } @Override public int interpret() { return leftExpression.interpret() + rightExpression.interpret(); } @Override public String toString() { return "+"; } } java-design-patterns-1.9.0/interpreter/src/test/000077500000000000000000000000001264154357600216755ustar00rootroot00000000000000java-design-patterns-1.9.0/interpreter/src/test/java/000077500000000000000000000000001264154357600226165ustar00rootroot00000000000000java-design-patterns-1.9.0/interpreter/src/test/java/com/000077500000000000000000000000001264154357600233745ustar00rootroot00000000000000java-design-patterns-1.9.0/interpreter/src/test/java/com/iluwatar/000077500000000000000000000000001264154357600252245ustar00rootroot00000000000000java-design-patterns-1.9.0/interpreter/src/test/java/com/iluwatar/interpreter/000077500000000000000000000000001264154357600275675ustar00rootroot00000000000000java-design-patterns-1.9.0/interpreter/src/test/java/com/iluwatar/interpreter/AppTest.java000066400000000000000000000003071264154357600320120ustar00rootroot00000000000000package com.iluwatar.interpreter; import org.junit.Test; /** * * Application test * */ public class AppTest { @Test public void test() { String[] args = {}; App.main(args); } } java-design-patterns-1.9.0/interpreter/src/test/java/com/iluwatar/interpreter/ExpressionTest.java000066400000000000000000000063051264154357600334350ustar00rootroot00000000000000package com.iluwatar.interpreter; import org.junit.Test; import java.util.ArrayList; import java.util.List; import java.util.function.BiFunction; import static org.junit.Assert.assertEquals; import static org.junit.Assert.assertNotNull; /** * Date: 12/14/15 - 11:48 AM * * @author Jeroen Meulemeester */ public abstract class ExpressionTest { /** * Generate inputs ranging from -10 to 10 for both input params and calculate the expected result * * @param resultCalc The function used to calculate the expected result * @return A data set with test entries */ static List prepareParameters(final BiFunction resultCalc) { final List testData = new ArrayList<>(); for (int i = -10; i < 10; i++) { for (int j = -10; j < 10; j++) { testData.add(new Object[]{ new NumberExpression(i), new NumberExpression(j), resultCalc.apply(i, j) }); } } return testData; } /** * The input used as first parameter during the test */ private final NumberExpression first; /** * The input used as second parameter during the test */ private final NumberExpression second; /** * The expected result of the calculation, taking the first and second parameter in account */ private final int result; /** * The expected {@link E#toString()} response */ private final String expectedToString; /** * Factory, used to create a new test object instance with the correct first and second parameter */ private final BiFunction factory; /** * Create a new test instance with the given parameters and expected results * * @param first The input used as first parameter during the test * @param second The input used as second parameter during the test * @param result The expected result of the tested expression * @param expectedToString The expected {@link E#toString()} response * @param factory Factory, used to create a new test object instance */ ExpressionTest(final NumberExpression first, final NumberExpression second, final int result, final String expectedToString, final BiFunction factory) { this.first = first; this.second = second; this.result = result; this.expectedToString = expectedToString; this.factory = factory; } /** * Get the first parameter * * @return The first parameter */ final NumberExpression getFirst() { return this.first; } /** * Verify if the expression calculates the correct result when calling {@link E#interpret()} */ @Test public void testInterpret() { final E expression = this.factory.apply(this.first, this.second); assertNotNull(expression); assertEquals(this.result, expression.interpret()); } /** * Verify if the expression has the expected {@link E#toString()} value */ @Test public void testToString() { final E expression = this.factory.apply(this.first, this.second); assertNotNull(expression); assertEquals(expectedToString, expression.toString()); } } MinusExpressionTest.java000066400000000000000000000017771264154357600344020ustar00rootroot00000000000000java-design-patterns-1.9.0/interpreter/src/test/java/com/iluwatar/interpreterpackage com.iluwatar.interpreter; import org.junit.runner.RunWith; import org.junit.runners.Parameterized; import org.junit.runners.Parameterized.Parameters; import java.util.List; /** * Date: 12/14/15 - 12:08 PM * * @author Jeroen Meulemeester */ @RunWith(Parameterized.class) public class MinusExpressionTest extends ExpressionTest { /** * Create a new set of test entries with the expected result * * @return The list of parameters used during this test */ @Parameters public static List data() { return prepareParameters((f, s) -> f - s); } /** * Create a new test instance using the given test parameters and expected result * * @param first The first expression parameter * @param second The second expression parameter * @param result The expected result */ public MinusExpressionTest(final NumberExpression first, final NumberExpression second, final int result) { super(first, second, result, "-", MinusExpression::new); } }MultiplyExpressionTest.java000066400000000000000000000020131264154357600351060ustar00rootroot00000000000000java-design-patterns-1.9.0/interpreter/src/test/java/com/iluwatar/interpreterpackage com.iluwatar.interpreter; import org.junit.runner.RunWith; import org.junit.runners.Parameterized; import org.junit.runners.Parameterized.Parameters; import java.util.List; /** * Date: 12/14/15 - 12:08 PM * * @author Jeroen Meulemeester */ @RunWith(Parameterized.class) public class MultiplyExpressionTest extends ExpressionTest { /** * Create a new set of test entries with the expected result * * @return The list of parameters used during this test */ @Parameters public static List data() { return prepareParameters((f, s) -> f * s); } /** * Create a new test instance using the given test parameters and expected result * * @param first The first expression parameter * @param second The second expression parameter * @param result The expected result */ public MultiplyExpressionTest(final NumberExpression first, final NumberExpression second, final int result) { super(first, second, result, "*", MultiplyExpression::new); } }NumberExpressionTest.java000066400000000000000000000027671264154357600345370ustar00rootroot00000000000000java-design-patterns-1.9.0/interpreter/src/test/java/com/iluwatar/interpreterpackage com.iluwatar.interpreter; import org.junit.Test; import org.junit.runner.RunWith; import org.junit.runners.Parameterized; import org.junit.runners.Parameterized.Parameters; import java.util.List; import static org.junit.Assert.assertEquals; /** * Date: 12/14/15 - 12:08 PM * * @author Jeroen Meulemeester */ @RunWith(Parameterized.class) public class NumberExpressionTest extends ExpressionTest { /** * Create a new set of test entries with the expected result * * @return The list of parameters used during this test */ @Parameters public static List data() { return prepareParameters((f, s) -> f); } /** * Create a new test instance using the given test parameters and expected result * * @param first The first expression parameter * @param second The second expression parameter * @param result The expected result */ public NumberExpressionTest(final NumberExpression first, final NumberExpression second, final int result) { super(first, second, result, "number", (f, s) -> f); } /** * Verify if the {@link NumberExpression#NumberExpression(String)} constructor works as expected */ @Test public void testFromString() throws Exception { final int expectedValue = getFirst().interpret(); final String testStingValue = String.valueOf(expectedValue); final NumberExpression numberExpression = new NumberExpression(testStingValue); assertEquals(expectedValue, numberExpression.interpret()); } }PlusExpressionTest.java000066400000000000000000000017731264154357600342260ustar00rootroot00000000000000java-design-patterns-1.9.0/interpreter/src/test/java/com/iluwatar/interpreterpackage com.iluwatar.interpreter; import org.junit.runner.RunWith; import org.junit.runners.Parameterized; import org.junit.runners.Parameterized.Parameters; import java.util.List; /** * Date: 12/14/15 - 12:08 PM * * @author Jeroen Meulemeester */ @RunWith(Parameterized.class) public class PlusExpressionTest extends ExpressionTest { /** * Create a new set of test entries with the expected result * * @return The list of parameters used during this test */ @Parameters public static List data() { return prepareParameters((f, s) -> f + s); } /** * Create a new test instance using the given test parameters and expected result * * @param first The first expression parameter * @param second The second expression parameter * @param result The expected result */ public PlusExpressionTest(final NumberExpression first, final NumberExpression second, final int result) { super(first, second, result, "+", PlusExpression::new); 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W]fH](ƍc)),}P()NnӧOR Pykd.C ZM΢.10CFZJ[IIʕguĉ:Tcٯ_)ꜟs.10C&zΝ={VDF}ZN"33𴞿ث.10Czx z!^ iл ]L f@d.10Ci&ȁ{+=3x/2лEMkIENDB`java-design-patterns-1.9.0/iterator/index.md000066400000000000000000000016331264154357600210510ustar00rootroot00000000000000--- layout: pattern title: Iterator folder: iterator permalink: /patterns/iterator/ categories: Behavioral tags: - Java - Difficulty-Beginner - Gang Of Four --- **Also known as:** Cursor **Intent:** Provide a way to access the elements of an aggregate object sequentially without exposing its underlying representation. ![alt text](./etc/iterator_1.png "Iterator") **Applicability:** Use the Iterator pattern * to access an aggregate object's contents without exposing its internal representation * to support multiple traversals of aggregate objects * to provide a uniform interface for traversing different aggregate structures **Real world examples:** * [java.util.Iterator](http://docs.oracle.com/javase/8/docs/api/java/util/Iterator.html) **Credits** * [Design Patterns: Elements of Reusable Object-Oriented Software](http://www.amazon.com/Design-Patterns-Elements-Reusable-Object-Oriented/dp/0201633612) java-design-patterns-1.9.0/iterator/pom.xml000066400000000000000000000011511264154357600207300ustar00rootroot00000000000000 4.0.0 com.iluwatar java-design-patterns 1.9.0 iterator junit junit test java-design-patterns-1.9.0/iterator/src/000077500000000000000000000000001264154357600202045ustar00rootroot00000000000000java-design-patterns-1.9.0/iterator/src/main/000077500000000000000000000000001264154357600211305ustar00rootroot00000000000000java-design-patterns-1.9.0/iterator/src/main/java/000077500000000000000000000000001264154357600220515ustar00rootroot00000000000000java-design-patterns-1.9.0/iterator/src/main/java/com/000077500000000000000000000000001264154357600226275ustar00rootroot00000000000000java-design-patterns-1.9.0/iterator/src/main/java/com/iluwatar/000077500000000000000000000000001264154357600244575ustar00rootroot00000000000000java-design-patterns-1.9.0/iterator/src/main/java/com/iluwatar/iterator/000077500000000000000000000000001264154357600263105ustar00rootroot00000000000000java-design-patterns-1.9.0/iterator/src/main/java/com/iluwatar/iterator/App.java000066400000000000000000000025551264154357600277020ustar00rootroot00000000000000package com.iluwatar.iterator; /** * * The Iterator pattern is a design pattern in which an iterator is used to traverse a container and * access the container's elements. The Iterator pattern decouples algorithms from containers. *

* In this example the Iterator ({@link ItemIterator}) adds abstraction layer on top of a collection * ({@link TreasureChest}). This way the collection can change its internal implementation without * affecting its clients. * */ public class App { /** * Program entry point * * @param args command line args */ public static void main(String[] args) { TreasureChest chest = new TreasureChest(); ItemIterator ringIterator = chest.iterator(ItemType.RING); while (ringIterator.hasNext()) { System.out.println(ringIterator.next()); } System.out.println("----------"); ItemIterator potionIterator = chest.iterator(ItemType.POTION); while (potionIterator.hasNext()) { System.out.println(potionIterator.next()); } System.out.println("----------"); ItemIterator weaponIterator = chest.iterator(ItemType.WEAPON); while (weaponIterator.hasNext()) { System.out.println(weaponIterator.next()); } System.out.println("----------"); ItemIterator it = chest.iterator(ItemType.ANY); while (it.hasNext()) { System.out.println(it.next()); } } } java-design-patterns-1.9.0/iterator/src/main/java/com/iluwatar/iterator/Item.java000066400000000000000000000006221264154357600300510ustar00rootroot00000000000000package com.iluwatar.iterator; /** * * Item * */ public class Item { private ItemType type; private String name; public Item(ItemType type, String name) { this.setType(type); this.name = name; } @Override public String toString() { return name; } public ItemType getType() { return type; } public void setType(ItemType type) { this.type = type; } } java-design-patterns-1.9.0/iterator/src/main/java/com/iluwatar/iterator/ItemIterator.java000066400000000000000000000002231264154357600315600ustar00rootroot00000000000000package com.iluwatar.iterator; /** * * ItemIterator interface. * */ public interface ItemIterator { boolean hasNext(); Item next(); } java-design-patterns-1.9.0/iterator/src/main/java/com/iluwatar/iterator/ItemType.java000066400000000000000000000001761264154357600307170ustar00rootroot00000000000000package com.iluwatar.iterator; /** * * ItemType enumeration * */ public enum ItemType { ANY, WEAPON, RING, POTION } java-design-patterns-1.9.0/iterator/src/main/java/com/iluwatar/iterator/TreasureChest.java000066400000000000000000000022171264154357600317360ustar00rootroot00000000000000package com.iluwatar.iterator; import java.util.ArrayList; import java.util.List; /** * * TreasureChest, the collection class. * */ public class TreasureChest { private List items; /** * Constructor */ public TreasureChest() { items = new ArrayList<>(); items.add(new Item(ItemType.POTION, "Potion of courage")); items.add(new Item(ItemType.RING, "Ring of shadows")); items.add(new Item(ItemType.POTION, "Potion of wisdom")); items.add(new Item(ItemType.POTION, "Potion of blood")); items.add(new Item(ItemType.WEAPON, "Sword of silver +1")); items.add(new Item(ItemType.POTION, "Potion of rust")); items.add(new Item(ItemType.POTION, "Potion of healing")); items.add(new Item(ItemType.RING, "Ring of armor")); items.add(new Item(ItemType.WEAPON, "Steel halberd")); items.add(new Item(ItemType.WEAPON, "Dagger of poison")); } ItemIterator iterator(ItemType itemType) { return new TreasureChestItemIterator(this, itemType); } /** * Get all items */ public List getItems() { ArrayList list = new ArrayList<>(); list.addAll(items); return list; } } TreasureChestItemIterator.java000066400000000000000000000017761264154357600342210ustar00rootroot00000000000000java-design-patterns-1.9.0/iterator/src/main/java/com/iluwatar/iteratorpackage com.iluwatar.iterator; import java.util.List; /** * * TreasureChestItemIterator * */ public class TreasureChestItemIterator implements ItemIterator { private TreasureChest chest; private int idx; private ItemType type; /** * Constructor */ public TreasureChestItemIterator(TreasureChest chest, ItemType type) { this.chest = chest; this.type = type; this.idx = -1; } @Override public boolean hasNext() { return findNextIdx() != -1; } @Override public Item next() { idx = findNextIdx(); if (idx != -1) { return chest.getItems().get(idx); } return null; } private int findNextIdx() { List items = chest.getItems(); boolean found = false; int tempIdx = idx; while (!found) { tempIdx++; if (tempIdx >= items.size()) { tempIdx = -1; break; } if (type.equals(ItemType.ANY) || items.get(tempIdx).getType().equals(type)) { break; } } return tempIdx; } } java-design-patterns-1.9.0/iterator/src/test/000077500000000000000000000000001264154357600211635ustar00rootroot00000000000000java-design-patterns-1.9.0/iterator/src/test/java/000077500000000000000000000000001264154357600221045ustar00rootroot00000000000000java-design-patterns-1.9.0/iterator/src/test/java/com/000077500000000000000000000000001264154357600226625ustar00rootroot00000000000000java-design-patterns-1.9.0/iterator/src/test/java/com/iluwatar/000077500000000000000000000000001264154357600245125ustar00rootroot00000000000000java-design-patterns-1.9.0/iterator/src/test/java/com/iluwatar/iterator/000077500000000000000000000000001264154357600263435ustar00rootroot00000000000000java-design-patterns-1.9.0/iterator/src/test/java/com/iluwatar/iterator/AppTest.java000066400000000000000000000003041264154357600305630ustar00rootroot00000000000000package com.iluwatar.iterator; import org.junit.Test; /** * * Application test * */ public class AppTest { @Test public void test() { String[] args = {}; App.main(args); } } java-design-patterns-1.9.0/iterator/src/test/java/com/iluwatar/iterator/TreasureChestTest.java000066400000000000000000000065161264154357600326370ustar00rootroot00000000000000package com.iluwatar.iterator; import org.junit.Test; import org.junit.runner.RunWith; import org.junit.runners.Parameterized; import java.util.ArrayList; import java.util.List; import static org.junit.Assert.assertEquals; import static org.junit.Assert.assertNotNull; import static org.junit.Assert.fail; /** * Date: 12/14/15 - 2:58 PM * * @author Jeroen Meulemeester */ @RunWith(Parameterized.class) public class TreasureChestTest { /** * Create a list of all expected items in the chest. * * @return The set of all expected items in the chest */ @Parameterized.Parameters public static List data() { final List parameters = new ArrayList<>(); parameters.add(new Object[]{new Item(ItemType.POTION, "Potion of courage")}); parameters.add(new Object[]{new Item(ItemType.RING, "Ring of shadows")}); parameters.add(new Object[]{new Item(ItemType.POTION, "Potion of wisdom")}); parameters.add(new Object[]{new Item(ItemType.POTION, "Potion of blood")}); parameters.add(new Object[]{new Item(ItemType.WEAPON, "Sword of silver +1")}); parameters.add(new Object[]{new Item(ItemType.POTION, "Potion of rust")}); parameters.add(new Object[]{new Item(ItemType.POTION, "Potion of healing")}); parameters.add(new Object[]{new Item(ItemType.RING, "Ring of armor")}); parameters.add(new Object[]{new Item(ItemType.WEAPON, "Steel halberd")}); parameters.add(new Object[]{new Item(ItemType.WEAPON, "Dagger of poison")}); return parameters; } /** * One of the expected items in the chest */ private final Item expectedItem; /** * Create a new test instance, test if the given expected item can be retrieved from the chest * * @param expectedItem One of the items that should be in the chest */ public TreasureChestTest(final Item expectedItem) { this.expectedItem = expectedItem; } /** * Test if the expected item can be retrieved from the chest using the {@link ItemIterator} */ @Test public void testIterator() { final TreasureChest chest = new TreasureChest(); final ItemIterator iterator = chest.iterator(expectedItem.getType()); assertNotNull(iterator); while (iterator.hasNext()) { final Item item = iterator.next(); assertNotNull(item); assertEquals(this.expectedItem.getType(), item.getType()); final String name = item.toString(); assertNotNull(name); if (this.expectedItem.toString().equals(name)) { return; } } fail("Expected to find item [" + this.expectedItem + "] using iterator, but we didn't."); } /** * Test if the expected item can be retrieved from the chest using the {@link * TreasureChest#getItems()} method */ @Test public void testGetItems() throws Exception { final TreasureChest chest = new TreasureChest(); final List items = chest.getItems(); assertNotNull(items); for (final Item item : items) { assertNotNull(item); assertNotNull(item.getType()); assertNotNull(item.toString()); final boolean sameType = this.expectedItem.getType() == item.getType(); final boolean sameName = this.expectedItem.toString().equals(item.toString()); if (sameType && sameName) { return; 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* This example demonstrates a traditional 3-layer architecture consisting of data access layer, business layer and * presentation layer. *

* The data access layer is formed of Spring Data repositories CakeDao, CakeToppingDao and * CakeLayerDao. The repositories can be used for CRUD operations on cakes, cake toppings and cake layers * respectively. *

* The business layer is built on top of the data access layer. CakeBakingService offers methods to * retrieve available cake toppings and cake layers and baked cakes. Also the service is used to create new cakes out of * cake toppings and cake layers. *

* The presentation layer is built on the business layer and in this example it simply lists the cakes that have been * baked. *

* We have applied so called strict layering which means that the layers can only access the classes directly beneath * them. This leads the solution to create an additional set of DTOs ( CakeInfo, * CakeToppingInfo, CakeLayerInfo) to translate data between layers. In other words, * CakeBakingService cannot return entities ( Cake, CakeTopping, * CakeLayer) directly since these reside on data access layer but instead translates these into business * layer DTOs (CakeInfo, CakeToppingInfo, CakeLayerInfo) and returns them * instead. This way the presentation layer does not have any knowledge of other layers than the business layer and thus * is not affected by changes to them. * * @see Cake * @see CakeTopping * @see CakeLayer * @see CakeDao * @see CakeToppingDao * @see CakeLayerDao * @see CakeBakingService * @see CakeInfo * @see CakeToppingInfo * @see CakeLayerInfo * */ public class App { private static CakeBakingService cakeBakingService = new CakeBakingServiceImpl(); /** * Application entry point * * @param args Command line parameters */ public static void main(String[] args) { // initialize example data initializeData(cakeBakingService); // create view and render it CakeViewImpl cakeView = new CakeViewImpl(cakeBakingService); cakeView.render(); } /** * Initializes the example data */ private static void initializeData(CakeBakingService cakeBakingService) { cakeBakingService.saveNewLayer(new CakeLayerInfo("chocolate", 1200)); cakeBakingService.saveNewLayer(new CakeLayerInfo("banana", 900)); cakeBakingService.saveNewLayer(new CakeLayerInfo("strawberry", 950)); cakeBakingService.saveNewLayer(new CakeLayerInfo("lemon", 950)); cakeBakingService.saveNewLayer(new CakeLayerInfo("vanilla", 950)); cakeBakingService.saveNewLayer(new CakeLayerInfo("strawberry", 950)); cakeBakingService.saveNewTopping(new CakeToppingInfo("candies", 350)); cakeBakingService.saveNewTopping(new CakeToppingInfo("cherry", 350)); CakeInfo cake1 = new CakeInfo(new CakeToppingInfo("candies", 0), Arrays.asList(new CakeLayerInfo( "chocolate", 0), new CakeLayerInfo("banana", 0), new CakeLayerInfo("strawberry", 0))); try { cakeBakingService.bakeNewCake(cake1); } catch (CakeBakingException e) { e.printStackTrace(); } CakeInfo cake2 = new CakeInfo(new CakeToppingInfo("cherry", 0), Arrays.asList( new CakeLayerInfo("vanilla", 0), new CakeLayerInfo("lemon", 0), new CakeLayerInfo( "strawberry", 0))); try { cakeBakingService.bakeNewCake(cake2); } catch (CakeBakingException e) { e.printStackTrace(); } } } java-design-patterns-1.9.0/layers/src/main/java/com/iluwatar/layers/Cake.java000066400000000000000000000023461264154357600271370ustar00rootroot00000000000000package com.iluwatar.layers; import java.util.HashSet; import java.util.Set; import javax.persistence.CascadeType; import javax.persistence.Entity; import javax.persistence.FetchType; import javax.persistence.GeneratedValue; import javax.persistence.Id; import javax.persistence.OneToMany; import javax.persistence.OneToOne; /** * * Cake entity * */ @Entity public class Cake { @Id @GeneratedValue private Long id; @OneToOne(cascade = CascadeType.REMOVE) private CakeTopping topping; @OneToMany(cascade = CascadeType.REMOVE, fetch = FetchType.EAGER) private Set layers; public Cake() { setLayers(new HashSet<>()); } public Long getId() { return id; } public void setId(Long id) { this.id = id; } public CakeTopping getTopping() { return topping; } public void setTopping(CakeTopping topping) { this.topping = topping; } public Set getLayers() { return layers; } public void setLayers(Set layers) { this.layers = layers; } public void addLayer(CakeLayer layer) { this.layers.add(layer); } @Override public String toString() { return String.format("id=%s topping=%s layers=%s", id, topping, layers.toString()); } } java-design-patterns-1.9.0/layers/src/main/java/com/iluwatar/layers/CakeBakingException.java000066400000000000000000000004531264154357600321270ustar00rootroot00000000000000package com.iluwatar.layers; /** * * Custom exception used in cake baking * */ public class CakeBakingException extends Exception { private static final long serialVersionUID = 1L; public CakeBakingException() {} public CakeBakingException(String message) { super(message); } } java-design-patterns-1.9.0/layers/src/main/java/com/iluwatar/layers/CakeBakingService.java000066400000000000000000000012631264154357600315710ustar00rootroot00000000000000package com.iluwatar.layers; import java.util.List; /** * * Service for cake baking operations * */ public interface CakeBakingService { /** * Bakes new cake according to parameters */ void bakeNewCake(CakeInfo cakeInfo) throws CakeBakingException; /** * Get all cakes */ List getAllCakes(); /** * Store new cake topping */ void saveNewTopping(CakeToppingInfo toppingInfo); /** * Get available cake toppings */ List getAvailableToppings(); /** * Add new cake layer */ void saveNewLayer(CakeLayerInfo layerInfo); /** * Get available cake layers */ List getAvailableLayers(); } java-design-patterns-1.9.0/layers/src/main/java/com/iluwatar/layers/CakeBakingServiceImpl.java000066400000000000000000000124161264154357600324150ustar00rootroot00000000000000package com.iluwatar.layers; import java.util.ArrayList; import java.util.HashSet; import java.util.Iterator; import java.util.List; import java.util.Optional; import java.util.Set; import java.util.stream.Collectors; import org.springframework.context.support.AbstractApplicationContext; import org.springframework.context.support.ClassPathXmlApplicationContext; import org.springframework.stereotype.Service; import org.springframework.transaction.annotation.Transactional; /** * * Implementation of CakeBakingService * */ @Service @Transactional public class CakeBakingServiceImpl implements CakeBakingService { private AbstractApplicationContext context; public CakeBakingServiceImpl() { this.context = new ClassPathXmlApplicationContext("applicationContext.xml"); } @Override public void bakeNewCake(CakeInfo cakeInfo) throws CakeBakingException { List allToppings = getAvailableToppingEntities(); List matchingToppings = allToppings.stream().filter((t) -> t.getName().equals(cakeInfo.cakeToppingInfo.name)) .collect(Collectors.toList()); if (matchingToppings.isEmpty()) { throw new CakeBakingException(String.format("Topping %s is not available", cakeInfo.cakeToppingInfo.name)); } List allLayers = getAvailableLayerEntities(); Set foundLayers = new HashSet<>(); for (CakeLayerInfo info : cakeInfo.cakeLayerInfos) { Optional found = allLayers.stream().filter((layer) -> layer.getName().equals(info.name)).findFirst(); if (!found.isPresent()) { throw new CakeBakingException(String.format("Layer %s is not available", info.name)); } else { foundLayers.add(found.get()); } } CakeToppingDao toppingBean = context.getBean(CakeToppingDao.class); CakeTopping topping = toppingBean.findOne(matchingToppings.iterator().next().getId()); CakeDao cakeBean = context.getBean(CakeDao.class); Cake cake = new Cake(); cake.setTopping(topping); cake.setLayers(foundLayers); cakeBean.save(cake); topping.setCake(cake); toppingBean.save(topping); CakeLayerDao layerBean = context.getBean(CakeLayerDao.class); for (CakeLayer layer : foundLayers) { layer.setCake(cake); layerBean.save(layer); } } @Override public void saveNewTopping(CakeToppingInfo toppingInfo) { CakeToppingDao bean = context.getBean(CakeToppingDao.class); bean.save(new CakeTopping(toppingInfo.name, toppingInfo.calories)); } @Override public void saveNewLayer(CakeLayerInfo layerInfo) { CakeLayerDao bean = context.getBean(CakeLayerDao.class); bean.save(new CakeLayer(layerInfo.name, layerInfo.calories)); } private List getAvailableToppingEntities() { CakeToppingDao bean = context.getBean(CakeToppingDao.class); List result = new ArrayList<>(); Iterator iterator = bean.findAll().iterator(); while (iterator.hasNext()) { CakeTopping topping = iterator.next(); if (topping.getCake() == null) { result.add(topping); } } return result; } @Override public List getAvailableToppings() { CakeToppingDao bean = context.getBean(CakeToppingDao.class); List result = new ArrayList<>(); Iterator iterator = bean.findAll().iterator(); while (iterator.hasNext()) { CakeTopping next = iterator.next(); if (next.getCake() == null) { result.add(new CakeToppingInfo(next.getId(), next.getName(), next.getCalories())); } } return result; } private List getAvailableLayerEntities() { CakeLayerDao bean = context.getBean(CakeLayerDao.class); List result = new ArrayList<>(); Iterator iterator = bean.findAll().iterator(); while (iterator.hasNext()) { CakeLayer next = iterator.next(); if (next.getCake() == null) { result.add(next); } } return result; } @Override public List getAvailableLayers() { CakeLayerDao bean = context.getBean(CakeLayerDao.class); List result = new ArrayList<>(); Iterator iterator = bean.findAll().iterator(); while (iterator.hasNext()) { CakeLayer next = iterator.next(); if (next.getCake() == null) { result.add(new CakeLayerInfo(next.getId(), next.getName(), next.getCalories())); } } return result; } @Override public List getAllCakes() { CakeDao cakeBean = context.getBean(CakeDao.class); List result = new ArrayList<>(); Iterator iterator = cakeBean.findAll().iterator(); while (iterator.hasNext()) { Cake cake = iterator.next(); CakeToppingInfo cakeToppingInfo = new CakeToppingInfo(cake.getTopping().getId(), cake.getTopping().getName(), cake .getTopping().getCalories()); ArrayList cakeLayerInfos = new ArrayList(); for (CakeLayer layer : cake.getLayers()) { cakeLayerInfos.add(new CakeLayerInfo(layer.getId(), layer.getName(), layer.getCalories())); } CakeInfo cakeInfo = new CakeInfo(cake.getId(), cakeToppingInfo, cakeLayerInfos); result.add(cakeInfo); } return result; } } java-design-patterns-1.9.0/layers/src/main/java/com/iluwatar/layers/CakeDao.java000066400000000000000000000004051264154357600275550ustar00rootroot00000000000000package com.iluwatar.layers; import org.springframework.data.repository.CrudRepository; import org.springframework.stereotype.Repository; /** * * CRUD repository for cakes * */ @Repository public interface CakeDao extends CrudRepository { } java-design-patterns-1.9.0/layers/src/main/java/com/iluwatar/layers/CakeInfo.java000066400000000000000000000022771264154357600277560ustar00rootroot00000000000000package com.iluwatar.layers; import java.util.List; import java.util.Optional; /** * * DTO for cakes * */ public class CakeInfo { public final Optional id; public final CakeToppingInfo cakeToppingInfo; public final List cakeLayerInfos; /** * Constructor */ public CakeInfo(Long id, CakeToppingInfo cakeToppingInfo, List cakeLayerInfos) { this.id = Optional.of(id); this.cakeToppingInfo = cakeToppingInfo; this.cakeLayerInfos = cakeLayerInfos; } /** * Constructor */ public CakeInfo(CakeToppingInfo cakeToppingInfo, List cakeLayerInfos) { this.id = Optional.empty(); this.cakeToppingInfo = cakeToppingInfo; this.cakeLayerInfos = cakeLayerInfos; } /** * Calculate calories */ public int calculateTotalCalories() { int total = cakeToppingInfo != null ? cakeToppingInfo.calories : 0; total += cakeLayerInfos.stream().mapToInt(c -> c.calories).sum(); return total; } @Override public String toString() { return String.format("CakeInfo id=%d topping=%s layers=%s totalCalories=%d", id.orElse(-1L), cakeToppingInfo, cakeLayerInfos, calculateTotalCalories()); } } java-design-patterns-1.9.0/layers/src/main/java/com/iluwatar/layers/CakeLayer.java000066400000000000000000000021661264154357600301340ustar00rootroot00000000000000package com.iluwatar.layers; import javax.persistence.CascadeType; import javax.persistence.Entity; import javax.persistence.GeneratedValue; import javax.persistence.Id; import javax.persistence.ManyToOne; /** * * CakeLayer entity * */ @Entity public class CakeLayer { @Id @GeneratedValue private Long id; private String name; private int calories; @ManyToOne(cascade = CascadeType.ALL) private Cake cake; public CakeLayer() {} public CakeLayer(String name, int calories) { this.setName(name); this.setCalories(calories); } public Long getId() { return id; } public void setId(Long id) { this.id = id; } public String getName() { return name; } public void setName(String name) { this.name = name; } public int getCalories() { return calories; } public void setCalories(int calories) { this.calories = calories; } @Override public String toString() { return String.format("id=%s name=%s calories=%d", id, name, calories); } public Cake getCake() { return cake; } public void setCake(Cake cake) { this.cake = cake; } } java-design-patterns-1.9.0/layers/src/main/java/com/iluwatar/layers/CakeLayerDao.java000066400000000000000000000004251264154357600305540ustar00rootroot00000000000000package com.iluwatar.layers; import org.springframework.data.repository.CrudRepository; import org.springframework.stereotype.Repository; /** * * CRUD repository for cake layers * */ @Repository public interface CakeLayerDao extends CrudRepository { } java-design-patterns-1.9.0/layers/src/main/java/com/iluwatar/layers/CakeLayerInfo.java000066400000000000000000000013121264154357600307400ustar00rootroot00000000000000package com.iluwatar.layers; import java.util.Optional; /** * * DTO for cake layers * */ public class CakeLayerInfo { public final Optional id; public final String name; public final int calories; /** * Constructor */ public CakeLayerInfo(Long id, String name, int calories) { this.id = Optional.of(id); this.name = name; this.calories = calories; } /** * Constructor */ public CakeLayerInfo(String name, int calories) { this.id = Optional.empty(); this.name = name; this.calories = calories; } @Override public String toString() { return String.format("CakeLayerInfo id=%d name=%s calories=%d", id.orElse(-1L), name, calories); } } java-design-patterns-1.9.0/layers/src/main/java/com/iluwatar/layers/CakeTopping.java000066400000000000000000000021741264154357600304770ustar00rootroot00000000000000package com.iluwatar.layers; import javax.persistence.CascadeType; import javax.persistence.Entity; import javax.persistence.GeneratedValue; import javax.persistence.Id; import javax.persistence.OneToOne; /** * * CakeTopping entity * */ @Entity public class CakeTopping { @Id @GeneratedValue private Long id; private String name; private int calories; @OneToOne(cascade = CascadeType.ALL) private Cake cake; public CakeTopping() {} public CakeTopping(String name, int calories) { this.setName(name); this.setCalories(calories); } public Long getId() { return id; } public void setId(Long id) { this.id = id; } public String getName() { return name; } public void setName(String name) { this.name = name; } public int getCalories() { return calories; } public void setCalories(int calories) { this.calories = calories; } @Override public String toString() { return String.format("id=%s name=%s calories=%d", id, name, calories); } public Cake getCake() { return cake; } public void setCake(Cake cake) { this.cake = cake; } } java-design-patterns-1.9.0/layers/src/main/java/com/iluwatar/layers/CakeToppingDao.java000066400000000000000000000004271264154357600311220ustar00rootroot00000000000000package com.iluwatar.layers; import org.springframework.data.repository.CrudRepository; import org.springframework.stereotype.Repository; /** * * CRUD repository cake toppings * */ @Repository public interface CakeToppingDao extends CrudRepository { } java-design-patterns-1.9.0/layers/src/main/java/com/iluwatar/layers/CakeToppingInfo.java000066400000000000000000000013241264154357600313070ustar00rootroot00000000000000package com.iluwatar.layers; import java.util.Optional; /** * * DTO for cake toppings * */ public class CakeToppingInfo { public final Optional id; public final String name; public final int calories; /** * Constructor */ public CakeToppingInfo(Long id, String name, int calories) { this.id = Optional.of(id); this.name = name; this.calories = calories; } /** * Constructor */ public CakeToppingInfo(String name, int calories) { this.id = Optional.empty(); this.name = name; this.calories = calories; } @Override public String toString() { return String.format("CakeToppingInfo id=%d name=%s calories=%d", id.orElse(-1L), name, calories); } } java-design-patterns-1.9.0/layers/src/main/java/com/iluwatar/layers/CakeViewImpl.java000066400000000000000000000006411264154357600306100ustar00rootroot00000000000000package com.iluwatar.layers; /** * * View implementation for displaying cakes * */ public class CakeViewImpl implements View { private CakeBakingService cakeBakingService; public CakeViewImpl(CakeBakingService cakeBakingService) { this.cakeBakingService = cakeBakingService; } public void render() { cakeBakingService.getAllCakes().stream().forEach((cake) -> System.out.println(cake)); } } java-design-patterns-1.9.0/layers/src/main/java/com/iluwatar/layers/View.java000066400000000000000000000001541264154357600272010ustar00rootroot00000000000000package com.iluwatar.layers; /** * * View interface * */ public interface View { void render(); } java-design-patterns-1.9.0/layers/src/main/resources/000077500000000000000000000000001264154357600226105ustar00rootroot00000000000000java-design-patterns-1.9.0/layers/src/main/resources/META-INF/000077500000000000000000000000001264154357600237505ustar00rootroot00000000000000java-design-patterns-1.9.0/layers/src/main/resources/META-INF/persistence.xml000066400000000000000000000005311264154357600270150ustar00rootroot00000000000000 java-design-patterns-1.9.0/layers/src/main/resources/applicationContext.xml000066400000000000000000000040111264154357600271760ustar00rootroot00000000000000 java-design-patterns-1.9.0/layers/src/test/000077500000000000000000000000001264154357600206315ustar00rootroot00000000000000java-design-patterns-1.9.0/layers/src/test/java/000077500000000000000000000000001264154357600215525ustar00rootroot00000000000000java-design-patterns-1.9.0/layers/src/test/java/com/000077500000000000000000000000001264154357600223305ustar00rootroot00000000000000java-design-patterns-1.9.0/layers/src/test/java/com/iluwatar/000077500000000000000000000000001264154357600241605ustar00rootroot00000000000000java-design-patterns-1.9.0/layers/src/test/java/com/iluwatar/layers/000077500000000000000000000000001264154357600254575ustar00rootroot00000000000000java-design-patterns-1.9.0/layers/src/test/java/com/iluwatar/layers/AppTest.java000066400000000000000000000003021264154357600276750ustar00rootroot00000000000000package com.iluwatar.layers; import org.junit.Test; /** * * Application test * */ public class AppTest { @Test public void test() { String[] args = {}; App.main(args); } } java-design-patterns-1.9.0/layers/src/test/java/com/iluwatar/layers/CakeBakingExceptionTest.java000066400000000000000000000014001264154357600330130ustar00rootroot00000000000000package com.iluwatar.layers; import org.junit.Test; import static org.junit.Assert.assertEquals; import static org.junit.Assert.assertNull; /** * Date: 12/15/15 - 7:57 PM * * @author Jeroen Meulemeester */ public class CakeBakingExceptionTest { @Test public void testConstructor() throws Exception { final CakeBakingException exception = new CakeBakingException(); assertNull(exception.getMessage()); assertNull(exception.getCause()); } @Test public void testConstructorWithMessage() throws Exception { final String expectedMessage = "message"; final CakeBakingException exception = new CakeBakingException(expectedMessage); assertEquals(expectedMessage, exception.getMessage()); assertNull(exception.getCause()); } } java-design-patterns-1.9.0/layers/src/test/java/com/iluwatar/layers/CakeBakingServiceImplTest.java000066400000000000000000000130561264154357600333110ustar00rootroot00000000000000package com.iluwatar.layers; import org.junit.Test; import java.util.Arrays; import java.util.Collections; import java.util.List; import static org.junit.Assert.assertEquals; import static org.junit.Assert.assertFalse; import static org.junit.Assert.assertNotNull; import static org.junit.Assert.assertTrue; /** * Date: 12/15/15 - 9:55 PM * * @author Jeroen Meulemeester */ public class CakeBakingServiceImplTest { @Test public void testLayers() throws CakeBakingException { final CakeBakingServiceImpl service = new CakeBakingServiceImpl(); final List initialLayers = service.getAvailableLayers(); assertNotNull(initialLayers); assertTrue(initialLayers.isEmpty()); service.saveNewLayer(new CakeLayerInfo("Layer1", 1000)); service.saveNewLayer(new CakeLayerInfo("Layer2", 2000)); final List availableLayers = service.getAvailableLayers(); assertNotNull(availableLayers); assertEquals(2, availableLayers.size()); for (final CakeLayerInfo layer : availableLayers) { assertNotNull(layer.id); assertNotNull(layer.name); assertNotNull(layer.toString()); assertTrue(layer.calories > 0); } } @Test public void testToppings() throws CakeBakingException { final CakeBakingServiceImpl service = new CakeBakingServiceImpl(); final List initialToppings = service.getAvailableToppings(); assertNotNull(initialToppings); assertTrue(initialToppings.isEmpty()); service.saveNewTopping(new CakeToppingInfo("Topping1", 1000)); service.saveNewTopping(new CakeToppingInfo("Topping2", 2000)); final List availableToppings = service.getAvailableToppings(); assertNotNull(availableToppings); assertEquals(2, availableToppings.size()); for (final CakeToppingInfo topping : availableToppings) { assertNotNull(topping.id); assertNotNull(topping.name); assertNotNull(topping.toString()); assertTrue(topping.calories > 0); } } @Test public void testBakeCakes() throws CakeBakingException { final CakeBakingServiceImpl service = new CakeBakingServiceImpl(); final List initialCakes = service.getAllCakes(); assertNotNull(initialCakes); assertTrue(initialCakes.isEmpty()); final CakeToppingInfo topping1 = new CakeToppingInfo("Topping1", 1000); final CakeToppingInfo topping2 = new CakeToppingInfo("Topping2", 2000); service.saveNewTopping(topping1); service.saveNewTopping(topping2); final CakeLayerInfo layer1 = new CakeLayerInfo("Layer1", 1000); final CakeLayerInfo layer2 = new CakeLayerInfo("Layer2", 2000); final CakeLayerInfo layer3 = new CakeLayerInfo("Layer3", 2000); service.saveNewLayer(layer1); service.saveNewLayer(layer2); service.saveNewLayer(layer3); service.bakeNewCake(new CakeInfo(topping1, Arrays.asList(layer1, layer2))); service.bakeNewCake(new CakeInfo(topping2, Collections.singletonList(layer3))); final List allCakes = service.getAllCakes(); assertNotNull(allCakes); assertEquals(2, allCakes.size()); for (final CakeInfo cakeInfo : allCakes) { assertNotNull(cakeInfo.id); assertNotNull(cakeInfo.cakeToppingInfo); assertNotNull(cakeInfo.cakeLayerInfos); assertNotNull(cakeInfo.toString()); assertFalse(cakeInfo.cakeLayerInfos.isEmpty()); assertTrue(cakeInfo.calculateTotalCalories() > 0); } } @Test(expected = CakeBakingException.class) public void testBakeCakeMissingTopping() throws CakeBakingException { final CakeBakingServiceImpl service = new CakeBakingServiceImpl(); final CakeLayerInfo layer1 = new CakeLayerInfo("Layer1", 1000); final CakeLayerInfo layer2 = new CakeLayerInfo("Layer2", 2000); service.saveNewLayer(layer1); service.saveNewLayer(layer2); final CakeToppingInfo missingTopping = new CakeToppingInfo("Topping1", 1000); service.bakeNewCake(new CakeInfo(missingTopping, Arrays.asList(layer1, layer2))); } @Test(expected = CakeBakingException.class) public void testBakeCakeMissingLayer() throws CakeBakingException { final CakeBakingServiceImpl service = new CakeBakingServiceImpl(); final List initialCakes = service.getAllCakes(); assertNotNull(initialCakes); assertTrue(initialCakes.isEmpty()); final CakeToppingInfo topping1 = new CakeToppingInfo("Topping1", 1000); service.saveNewTopping(topping1); final CakeLayerInfo layer1 = new CakeLayerInfo("Layer1", 1000); service.saveNewLayer(layer1); final CakeLayerInfo missingLayer = new CakeLayerInfo("Layer2", 2000); service.bakeNewCake(new CakeInfo(topping1, Arrays.asList(layer1, missingLayer))); } @Test(expected = CakeBakingException.class) public void testBakeCakesUsedLayer() throws CakeBakingException { final CakeBakingServiceImpl service = new CakeBakingServiceImpl(); final List initialCakes = service.getAllCakes(); assertNotNull(initialCakes); assertTrue(initialCakes.isEmpty()); final CakeToppingInfo topping1 = new CakeToppingInfo("Topping1", 1000); final CakeToppingInfo topping2 = new CakeToppingInfo("Topping2", 2000); service.saveNewTopping(topping1); service.saveNewTopping(topping2); final CakeLayerInfo layer1 = new CakeLayerInfo("Layer1", 1000); final CakeLayerInfo layer2 = new CakeLayerInfo("Layer2", 2000); service.saveNewLayer(layer1); service.saveNewLayer(layer2); service.bakeNewCake(new CakeInfo(topping1, Arrays.asList(layer1, layer2))); service.bakeNewCake(new CakeInfo(topping2, Collections.singletonList(layer2))); } } java-design-patterns-1.9.0/layers/src/test/java/com/iluwatar/layers/CakeTest.java000066400000000000000000000050711264154357600300300ustar00rootroot00000000000000package com.iluwatar.layers; import org.junit.Test; import java.util.HashSet; import java.util.Set; import static org.junit.Assert.assertEquals; import static org.junit.Assert.assertNotNull; import static org.junit.Assert.assertNull; import static org.junit.Assert.assertTrue; /** * Date: 12/15/15 - 8:02 PM * * @author Jeroen Meulemeester */ public class CakeTest { @Test public void testSetId() { final Cake cake = new Cake(); assertNull(cake.getId()); final Long expectedId = Long.valueOf(1234L); cake.setId(expectedId); assertEquals(expectedId, cake.getId()); } @Test public void testSetTopping() { final Cake cake = new Cake(); assertNull(cake.getTopping()); final CakeTopping expectedTopping = new CakeTopping("DummyTopping", 1000); cake.setTopping(expectedTopping); assertEquals(expectedTopping, cake.getTopping()); } @Test public void testSetLayers() { final Cake cake = new Cake(); assertNotNull(cake.getLayers()); assertTrue(cake.getLayers().isEmpty()); final Set expectedLayers = new HashSet<>(); expectedLayers.add(new CakeLayer("layer1", 1000)); expectedLayers.add(new CakeLayer("layer2", 2000)); expectedLayers.add(new CakeLayer("layer3", 3000)); cake.setLayers(expectedLayers); assertEquals(expectedLayers, cake.getLayers()); } @Test public void testAddLayer() { final Cake cake = new Cake(); assertNotNull(cake.getLayers()); assertTrue(cake.getLayers().isEmpty()); final Set initialLayers = new HashSet<>(); initialLayers.add(new CakeLayer("layer1", 1000)); initialLayers.add(new CakeLayer("layer2", 2000)); cake.setLayers(initialLayers); assertEquals(initialLayers, cake.getLayers()); final CakeLayer newLayer = new CakeLayer("layer3", 3000); cake.addLayer(newLayer); final Set expectedLayers = new HashSet<>(); expectedLayers.addAll(initialLayers); expectedLayers.addAll(initialLayers); expectedLayers.add(newLayer); assertEquals(expectedLayers, cake.getLayers()); } @Test public void testToString() { final CakeTopping topping = new CakeTopping("topping", 20); topping.setId(2345L); final CakeLayer layer = new CakeLayer("layer", 100); layer.setId(3456L); final Cake cake = new Cake(); cake.setId(1234L); cake.setTopping(topping); cake.addLayer(layer); final String expected = "id=1234 topping=id=2345 name=topping calories=20 " + "layers=[id=3456 name=layer calories=100]"; assertEquals(expected, cake.toString()); } } java-design-patterns-1.9.0/layers/src/test/java/com/iluwatar/layers/CakeViewImplTest.java000066400000000000000000000020651264154357600315050ustar00rootroot00000000000000package com.iluwatar.layers; import org.junit.Test; import java.util.ArrayList; import java.util.List; import static org.mockito.Mockito.*; /** * Date: 12/15/15 - 10:04 PM * * @author Jeroen Meulemeester */ public class CakeViewImplTest extends StdOutTest { /** * Verify if the cake view renders the expected result */ @Test public void testRender() { final List layers = new ArrayList<>(); layers.add(new CakeLayerInfo("layer1", 1000)); layers.add(new CakeLayerInfo("layer2", 2000)); layers.add(new CakeLayerInfo("layer3", 3000)); final List cakes = new ArrayList<>(); final CakeInfo cake = new CakeInfo(new CakeToppingInfo("topping", 1000), layers); cakes.add(cake); final CakeBakingService bakingService = mock(CakeBakingService.class); when(bakingService.getAllCakes()).thenReturn(cakes); final CakeViewImpl cakeView = new CakeViewImpl(bakingService); verifyZeroInteractions(getStdOutMock()); cakeView.render(); verify(getStdOutMock(), times(1)).println(cake); } } java-design-patterns-1.9.0/layers/src/test/java/com/iluwatar/layers/StdOutTest.java000066400000000000000000000023411264154357600304040ustar00rootroot00000000000000package com.iluwatar.layers; import org.junit.After; import org.junit.Before; import java.io.PrintStream; import static org.mockito.Mockito.mock; /** * Date: 12/10/15 - 8:37 PM * * @author Jeroen Meulemeester */ public abstract class StdOutTest { /** * The mocked standard out {@link PrintStream}, required since the actions of the views don't have * any influence on any other accessible objects, except for writing to std-out using {@link * System#out} */ private final PrintStream stdOutMock = mock(PrintStream.class); 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* This example shows different implementations of the pattern with increasing sophistication. *

* Additional information and lazy loading flavours are described in * http://martinfowler.com/eaaCatalog/lazyLoad.html * */ public class App { /** * Program entry point * * @param args command line args */ public static void main(String[] args) { // Simple lazy loader - not thread safe HolderNaive holderNaive = new HolderNaive(); Heavy heavy = holderNaive.getHeavy(); System.out.println("heavy=" + heavy); // Thread safe lazy loader, but with heavy synchronization on each access HolderThreadSafe holderThreadSafe = new HolderThreadSafe(); Heavy another = holderThreadSafe.getHeavy(); System.out.println("another=" + another); // The most efficient lazy loader utilizing Java 8 features Java8Holder java8Holder = new Java8Holder(); Heavy next = java8Holder.getHeavy(); System.out.println("next=" + next); } } java-design-patterns-1.9.0/lazy-loading/src/main/java/com/iluwatar/lazy/loading/Heavy.java000066400000000000000000000005601264154357600315340ustar00rootroot00000000000000package com.iluwatar.lazy.loading; /** * * Heavy objects are expensive to create. * */ public class Heavy { /** * Constructor */ public Heavy() { System.out.println("Creating Heavy ..."); try { Thread.sleep(1000); } catch (InterruptedException e) { e.printStackTrace(); } System.out.println("... Heavy created"); } } java-design-patterns-1.9.0/lazy-loading/src/main/java/com/iluwatar/lazy/loading/HolderNaive.java000066400000000000000000000006671264154357600326700ustar00rootroot00000000000000package com.iluwatar.lazy.loading; /** * * Simple implementation of the lazy loading idiom. However, this is not thread safe. * */ public class HolderNaive { private Heavy heavy; /** * Constructor */ public HolderNaive() { System.out.println("HolderNaive created"); } /** * Get heavy object */ public Heavy getHeavy() { if (heavy == null) { heavy = new Heavy(); } return heavy; } } HolderThreadSafe.java000066400000000000000000000010501264154357600335400ustar00rootroot00000000000000java-design-patterns-1.9.0/lazy-loading/src/main/java/com/iluwatar/lazy/loadingpackage com.iluwatar.lazy.loading; /** * * Same as HolderNaive but with added synchronization. This implementation is thread safe, but each * {@link #getHeavy()} call costs additional synchronization overhead. * */ public class HolderThreadSafe { private Heavy heavy; /** * Constructor */ public HolderThreadSafe() { System.out.println("HolderThreadSafe created"); } /** * Get heavy object */ public synchronized Heavy getHeavy() { if (heavy == null) { heavy = new Heavy(); } return heavy; } } java-design-patterns-1.9.0/lazy-loading/src/main/java/com/iluwatar/lazy/loading/Java8Holder.java000066400000000000000000000015241264154357600325700ustar00rootroot00000000000000package com.iluwatar.lazy.loading; import java.util.function.Supplier; /** * * This lazy loader is thread safe and more efficient than {@link HolderThreadSafe}. It utilizes * Java 8 functional interface {@link Supplier} as {@link Heavy} factory. * */ public class Java8Holder { private Supplier heavy = () -> createAndCacheHeavy(); public Java8Holder() { System.out.println("Java8Holder created"); } public Heavy getHeavy() { return heavy.get(); } private synchronized Heavy createAndCacheHeavy() { class HeavyFactory implements Supplier { private final Heavy heavyInstance = new Heavy(); @Override public Heavy get() { return heavyInstance; } } if (!HeavyFactory.class.isInstance(heavy)) { heavy = new HeavyFactory(); } return heavy.get(); } } java-design-patterns-1.9.0/lazy-loading/src/test/000077500000000000000000000000001264154357600217245ustar00rootroot00000000000000java-design-patterns-1.9.0/lazy-loading/src/test/java/000077500000000000000000000000001264154357600226455ustar00rootroot00000000000000java-design-patterns-1.9.0/lazy-loading/src/test/java/com/000077500000000000000000000000001264154357600234235ustar00rootroot00000000000000java-design-patterns-1.9.0/lazy-loading/src/test/java/com/iluwatar/000077500000000000000000000000001264154357600252535ustar00rootroot00000000000000java-design-patterns-1.9.0/lazy-loading/src/test/java/com/iluwatar/lazy/000077500000000000000000000000001264154357600262325ustar00rootroot00000000000000java-design-patterns-1.9.0/lazy-loading/src/test/java/com/iluwatar/lazy/loading/000077500000000000000000000000001264154357600276475ustar00rootroot00000000000000AbstractHolderTest.java000066400000000000000000000017761264154357600342070ustar00rootroot00000000000000java-design-patterns-1.9.0/lazy-loading/src/test/java/com/iluwatar/lazy/loadingpackage com.iluwatar.lazy.loading; import org.junit.Test; import static junit.framework.Assert.assertNotNull; import static junit.framework.Assert.assertSame; import static junit.framework.TestCase.assertNull; /** * Date: 12/19/15 - 11:58 AM * * @author Jeroen Meulemeester */ public abstract class AbstractHolderTest { /** * Get the internal state of the holder value * * @return The internal value */ abstract Heavy getInternalHeavyValue() throws Exception; /** * Request a lazy loaded {@link Heavy} object from the holder. * * @return The lazy loaded {@link Heavy} object */ abstract Heavy getHeavy() throws Exception; /** * This test shows that the heavy field is not instantiated until the method getHeavy is called */ @Test(timeout = 3000) public void testGetHeavy() throws Exception { assertNull(getInternalHeavyValue()); assertNotNull(getHeavy()); assertNotNull(getInternalHeavyValue()); assertSame(getHeavy(), getInternalHeavyValue()); } } java-design-patterns-1.9.0/lazy-loading/src/test/java/com/iluwatar/lazy/loading/AppTest.java000066400000000000000000000003101264154357600320640ustar00rootroot00000000000000package com.iluwatar.lazy.loading; import org.junit.Test; /** * * Application test * */ public class AppTest { @Test public void test() { String[] args = {}; App.main(args); } } java-design-patterns-1.9.0/lazy-loading/src/test/java/com/iluwatar/lazy/loading/HolderNaiveTest.java000066400000000000000000000010521264154357600335500ustar00rootroot00000000000000package com.iluwatar.lazy.loading; import java.lang.reflect.Field; /** * Date: 12/19/15 - 12:05 PM * * @author Jeroen Meulemeester */ public class HolderNaiveTest extends AbstractHolderTest { private final HolderNaive holder = new HolderNaive(); @Override Heavy getInternalHeavyValue() throws Exception { final Field holderField = HolderNaive.class.getDeclaredField("heavy"); holderField.setAccessible(true); return (Heavy) holderField.get(this.holder); } @Override Heavy getHeavy() { return holder.getHeavy(); } }HolderThreadSafeTest.java000066400000000000000000000011241264154357600344350ustar00rootroot00000000000000java-design-patterns-1.9.0/lazy-loading/src/test/java/com/iluwatar/lazy/loadingpackage com.iluwatar.lazy.loading; import java.lang.reflect.Field; /** * Date: 12/19/15 - 12:19 PM * * @author Jeroen Meulemeester */ public class HolderThreadSafeTest extends AbstractHolderTest { private final HolderThreadSafe holder = new HolderThreadSafe(); @Override Heavy getInternalHeavyValue() throws Exception { final Field holderField = HolderThreadSafe.class.getDeclaredField("heavy"); holderField.setAccessible(true); return (Heavy) holderField.get(this.holder); } @Override Heavy getHeavy() throws Exception { return this.holder.getHeavy(); } }java-design-patterns-1.9.0/lazy-loading/src/test/java/com/iluwatar/lazy/loading/Java8HolderTest.java000066400000000000000000000021721264154357600334630ustar00rootroot00000000000000package com.iluwatar.lazy.loading; import java.lang.reflect.Field; import java.util.function.Supplier; /** * Date: 12/19/15 - 12:27 PM * * @author Jeroen Meulemeester */ public class Java8HolderTest extends AbstractHolderTest { private final Java8Holder holder = new Java8Holder(); @Override Heavy getInternalHeavyValue() throws Exception { final Field holderField = Java8Holder.class.getDeclaredField("heavy"); 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Mediator promotes loose coupling by keeping objects from referring to each other explicitly, and it lets you vary their interaction independently. ![alt text](./etc/mediator_1.png "Mediator") **Applicability:** Use the Mediator pattern when * a set of objects communicate in well-defined but complex ways. The resulting interdependencies are unstructured and difficult to understand * reusing an object is difficult because it refers to and communicates with many other objects * a behavior that's distributed between several classes should be customizable without a lot of subclassing **Credits** * [Design Patterns: Elements of Reusable Object-Oriented Software](http://www.amazon.com/Design-Patterns-Elements-Reusable-Object-Oriented/dp/0201633612) java-design-patterns-1.9.0/mediator/pom.xml000066400000000000000000000013671264154357600207140ustar00rootroot00000000000000 4.0.0 com.iluwatar java-design-patterns 1.9.0 mediator junit junit test org.mockito mockito-core test java-design-patterns-1.9.0/mediator/src/000077500000000000000000000000001264154357600201575ustar00rootroot00000000000000java-design-patterns-1.9.0/mediator/src/main/000077500000000000000000000000001264154357600211035ustar00rootroot00000000000000java-design-patterns-1.9.0/mediator/src/main/java/000077500000000000000000000000001264154357600220245ustar00rootroot00000000000000java-design-patterns-1.9.0/mediator/src/main/java/com/000077500000000000000000000000001264154357600226025ustar00rootroot00000000000000java-design-patterns-1.9.0/mediator/src/main/java/com/iluwatar/000077500000000000000000000000001264154357600244325ustar00rootroot00000000000000java-design-patterns-1.9.0/mediator/src/main/java/com/iluwatar/mediator/000077500000000000000000000000001264154357600262365ustar00rootroot00000000000000java-design-patterns-1.9.0/mediator/src/main/java/com/iluwatar/mediator/Action.java000066400000000000000000000011511264154357600303140ustar00rootroot00000000000000package com.iluwatar.mediator; /** * * Action enumeration. * */ public enum Action { HUNT("hunted a rabbit", "arrives for dinner"), TALE("tells a tale", "comes to listen"), GOLD( "found gold", "takes his share of the gold"), ENEMY("spotted enemies", "runs for cover"), NONE( "", ""); private String title; private String description; Action(String title, String description) { this.title = title; this.description = description; } public String getDescription() { return description; } public String toString() { return title; } } java-design-patterns-1.9.0/mediator/src/main/java/com/iluwatar/mediator/App.java000066400000000000000000000036461264154357600276320ustar00rootroot00000000000000package com.iluwatar.mediator; /** * * The Mediator pattern defines an object that encapsulates how a set of objects interact. This * pattern is considered to be a behavioral pattern due to the way it can alter the program's * running behavior. *

* Usually a program is made up of a large number of classes. So the logic and computation is * distributed among these classes. However, as more classes are developed in a program, especially * during maintenance and/or refactoring, the problem of communication between these classes may * become more complex. This makes the program harder to read and maintain. Furthermore, it can * become difficult to change the program, since any change may affect code in several other * classes. *

* With the Mediator pattern, communication between objects is encapsulated with a mediator object. * Objects no longer communicate directly with each other, but instead communicate through the * mediator. This reduces the dependencies between communicating objects, thereby lowering the * coupling. *

* In this example the mediator encapsulates how a set of objects ({@link PartyMember}) interact. * Instead of referring to each other directly they use the mediator ({@link Party}) interface. * */ public class App { /** * Program entry point * * @param args command line args */ public static void main(String[] args) { // create party and members Party party = new PartyImpl(); Hobbit hobbit = new Hobbit(); Wizard wizard = new Wizard(); Rogue rogue = new Rogue(); Hunter hunter = new Hunter(); // add party members party.addMember(hobbit); party.addMember(wizard); party.addMember(rogue); party.addMember(hunter); // perform actions -> the other party members // are notified by the party hobbit.act(Action.ENEMY); wizard.act(Action.TALE); rogue.act(Action.GOLD); hunter.act(Action.HUNT); } } java-design-patterns-1.9.0/mediator/src/main/java/com/iluwatar/mediator/Hobbit.java000066400000000000000000000003121264154357600303040ustar00rootroot00000000000000package com.iluwatar.mediator; /** * * Hobbit party member. * */ public class Hobbit extends PartyMemberBase { @Override public String toString() { return "Hobbit"; } } java-design-patterns-1.9.0/mediator/src/main/java/com/iluwatar/mediator/Hunter.java000066400000000000000000000003101264154357600303400ustar00rootroot00000000000000package com.iluwatar.mediator; /** * * Hunter party member. * */ public class Hunter extends PartyMemberBase { @Override public String toString() { return "Hunter"; } } java-design-patterns-1.9.0/mediator/src/main/java/com/iluwatar/mediator/Party.java000066400000000000000000000003041264154357600301750ustar00rootroot00000000000000package com.iluwatar.mediator; /** * * Party interface. * */ public interface Party { void addMember(PartyMember member); void act(PartyMember actor, Action action); } java-design-patterns-1.9.0/mediator/src/main/java/com/iluwatar/mediator/PartyImpl.java000066400000000000000000000011551264154357600310240ustar00rootroot00000000000000package com.iluwatar.mediator; import java.util.ArrayList; import java.util.List; /** * * Party implementation. * */ public class PartyImpl implements Party { private final List members; public PartyImpl() { members = new ArrayList<>(); } @Override public void act(PartyMember actor, Action action) { for (PartyMember member : members) { if (!member.equals(actor)) { member.partyAction(action); } } } @Override public void addMember(PartyMember member) { members.add(member); member.joinedParty(this); } } java-design-patterns-1.9.0/mediator/src/main/java/com/iluwatar/mediator/PartyMember.java000066400000000000000000000003621264154357600313310ustar00rootroot00000000000000package com.iluwatar.mediator; /** * * Interface for party members interacting with {@link Party}. * */ public interface PartyMember { void joinedParty(Party party); void partyAction(Action action); void act(Action action); } java-design-patterns-1.9.0/mediator/src/main/java/com/iluwatar/mediator/PartyMemberBase.java000066400000000000000000000012641264154357600321260ustar00rootroot00000000000000package com.iluwatar.mediator; /** * * Abstract base class for party members. * */ public abstract class PartyMemberBase implements PartyMember { protected Party party; @Override public void joinedParty(Party party) { System.out.println(this + " joins the party"); this.party = party; } @Override public void partyAction(Action action) { System.out.println(this + " " + action.getDescription()); } @Override public void act(Action action) { if (party != null) { System.out.println(this + " " + action.toString()); party.act(this, action); } } @Override public abstract String toString(); } java-design-patterns-1.9.0/mediator/src/main/java/com/iluwatar/mediator/Rogue.java000066400000000000000000000003071264154357600301620ustar00rootroot00000000000000package com.iluwatar.mediator; /** * * Rogue party member. * */ public class Rogue extends PartyMemberBase { @Override public String toString() { return "Rogue"; } } java-design-patterns-1.9.0/mediator/src/main/java/com/iluwatar/mediator/Wizard.java000066400000000000000000000003121264154357600303350ustar00rootroot00000000000000package com.iluwatar.mediator; /** * * Wizard party member. * */ public class Wizard extends PartyMemberBase { @Override public String toString() { return "Wizard"; } } java-design-patterns-1.9.0/mediator/src/test/000077500000000000000000000000001264154357600211365ustar00rootroot00000000000000java-design-patterns-1.9.0/mediator/src/test/java/000077500000000000000000000000001264154357600220575ustar00rootroot00000000000000java-design-patterns-1.9.0/mediator/src/test/java/com/000077500000000000000000000000001264154357600226355ustar00rootroot00000000000000java-design-patterns-1.9.0/mediator/src/test/java/com/iluwatar/000077500000000000000000000000001264154357600244655ustar00rootroot00000000000000java-design-patterns-1.9.0/mediator/src/test/java/com/iluwatar/mediator/000077500000000000000000000000001264154357600262715ustar00rootroot00000000000000java-design-patterns-1.9.0/mediator/src/test/java/com/iluwatar/mediator/AppTest.java000066400000000000000000000003041264154357600305110ustar00rootroot00000000000000package com.iluwatar.mediator; import org.junit.Test; /** * * Application test * */ public class AppTest { @Test public void test() { String[] args = {}; App.main(args); } } java-design-patterns-1.9.0/mediator/src/test/java/com/iluwatar/mediator/PartyImplTest.java000066400000000000000000000021361264154357600317170ustar00rootroot00000000000000package com.iluwatar.mediator; import org.junit.Test; import static org.mockito.Mockito.mock; import static org.mockito.Mockito.verify; import static org.mockito.Mockito.verifyNoMoreInteractions; import static org.mockito.Mockito.verifyZeroInteractions; /** * Date: 12/19/15 - 10:00 PM * * @author Jeroen Meulemeester */ public class PartyImplTest { /** * Verify if a member is notified when it's joining a party. Generate an action and see if the * other member gets it. Also check members don't get their own actions. */ @Test public void testPartyAction() { final PartyMember partyMember1 = mock(PartyMember.class); final PartyMember partyMember2 = mock(PartyMember.class); final PartyImpl party = new PartyImpl(); party.addMember(partyMember1); party.addMember(partyMember2); verify(partyMember1).joinedParty(party); verify(partyMember2).joinedParty(party); party.act(partyMember1, Action.GOLD); verifyZeroInteractions(partyMember1); verify(partyMember2).partyAction(Action.GOLD); verifyNoMoreInteractions(partyMember1, partyMember2); } } java-design-patterns-1.9.0/mediator/src/test/java/com/iluwatar/mediator/PartyMemberTest.java000066400000000000000000000070411264154357600322250ustar00rootroot00000000000000package com.iluwatar.mediator; import org.junit.After; import org.junit.Before; import org.junit.Test; import org.junit.runner.RunWith; import org.junit.runners.Parameterized; import java.io.PrintStream; import java.util.Arrays; import java.util.Collection; import java.util.function.Supplier; import static org.junit.Assert.assertEquals; import static org.mockito.Mockito.mock; import static org.mockito.Mockito.verify; import static org.mockito.Mockito.verifyNoMoreInteractions; import static org.mockito.Mockito.verifyZeroInteractions; /** * Date: 12/19/15 - 10:13 PM * * @author Jeroen Meulemeester */ @RunWith(Parameterized.class) public class PartyMemberTest { @Parameterized.Parameters public static Collection[]> data() { return Arrays.asList( new Supplier[]{Hobbit::new}, new Supplier[]{Hunter::new}, new Supplier[]{Rogue::new}, new Supplier[]{Wizard::new} ); } /** * The mocked standard out {@link PrintStream}, required since some actions on a {@link * PartyMember} have any influence on any other accessible objects, except for writing to std-out * using {@link System#out} */ private final PrintStream stdOutMock = mock(PrintStream.class); /** * Keep the original std-out so it can be restored after the test */ private final PrintStream stdOutOrig = System.out; /** * Inject the mocked std-out {@link PrintStream} into the {@link System} class before each test */ @Before public void setUp() { System.setOut(this.stdOutMock); } /** * Removed the mocked std-out {@link PrintStream} again from the {@link System} class */ @After public void tearDown() { System.setOut(this.stdOutOrig); } /** * The factory, used to create a new instance of the tested party member */ private final Supplier memberSupplier; /** * Create a new test instance, using the given {@link PartyMember} factory * * @param memberSupplier The party member factory */ public PartyMemberTest(final Supplier memberSupplier) { this.memberSupplier = memberSupplier; } /** * Verify if a party action triggers the correct output to the std-Out */ @Test public void testPartyAction() { final PartyMember member = this.memberSupplier.get(); for (final Action action : Action.values()) { member.partyAction(action); verify(this.stdOutMock).println(member.toString() + " " + action.getDescription()); } verifyNoMoreInteractions(this.stdOutMock); } /** * Verify if a member action triggers the expected interactions with the party class */ @Test public void testAct() { final PartyMember member = this.memberSupplier.get(); member.act(Action.GOLD); verifyZeroInteractions(this.stdOutMock); final Party party = mock(Party.class); member.joinedParty(party); verify(this.stdOutMock).println(member.toString() + " joins the party"); for (final Action action : Action.values()) { member.act(action); verify(this.stdOutMock).println(member.toString() + " " + action.toString()); verify(party).act(member, action); } verifyNoMoreInteractions(party, this.stdOutMock); } /** * Verify if {@link PartyMember#toString()} generate the expected output */ @Test public void testToString() throws Exception { final PartyMember member = this.memberSupplier.get(); final Class memberClass = member.getClass(); assertEquals(memberClass.getSimpleName(), member.toString()); } } java-design-patterns-1.9.0/memento/000077500000000000000000000000001264154357600172305ustar00rootroot00000000000000java-design-patterns-1.9.0/memento/etc/000077500000000000000000000000001264154357600200035ustar00rootroot00000000000000java-design-patterns-1.9.0/memento/etc/memento.png000066400000000000000000000537341264154357600221710ustar00rootroot00000000000000PNG  IHDRKWIDATx{GaOm*UU*rRr8PD"ٲ$`kaX?~\98Ƭñ6 a֒D8dJjMح2 $h7)T=wOy|_}%;g>ӿ3hAVbAV AUhƳFԠ)W~ T!r`1\qE.nͲHI{~ʅ[hCACUe_oEX!|li:8]G bIՎcb ]%Tf<ʑчAl0.λxu'ӻ (*7b\A (S Uezw)xY:+lZ^ BA3VB B B B B B BݣWpQY yϋ_m]Z^6M#.9dCT4ҳq Tb r` Ezy}~oysK˯_Wgٍˣ  PRo_s]|6/yMHxʬ 38\&UڼPNy}{>S˫   n   n   n   n   n   n   n   n  ĺtV]"fg rek*A(A}$T9W1kt=WN6 u2_^)KcXՊ}w%xN rPlRpDFƈdaĕlnJφTI~Y"!{M0\+uҾޘ]\Y/M "'< U\S݆.ѡW,pJم\ǐy$A9B)WBe reĞ}jB1}2|h qqb# t+KPR PU;6Pơ&eJP}6?GqP1 HIi5ezxn})4Bv\UA(A~wdTʮ籒&GBI_Naeվ.z-o&F/\˫  ?BUZ9  rm396}.Pd rPͽ< BA BA BA BA BAj/yu^4 BAj/JGGA(A T_ yedS|,̌"oS©@^87dpN\N~܌n rP%Zҹk:E)a2@\$ͶTIrMmjf~]D2 S8Nڤ+ r Y41aL\khM"5:hk P3ke0&eЪ \ T ]˫"6Sg1dXCs2&P%.ky3yeDn    n   n   n   n   n  NAP"\yPPFhCz6d/ n   n  B߶v/͟z ':QP 26CEA(Ab>\h r7hzA2ME6~bQ"kzd BA%O.d~t'lTmF /R} {  u~zz2y1WKR2 `۔}Cª|Cg BA2G?yo~+_G^e0 ]YQ߄^Yg4I#ՒlRm՞o%LLLw=]ⶓ8WfW}J Pt_|x_ ,֤O+ఢ 3ϤJ$!)J6h^h2-ӫ>|^N BAziם/ߙ{v',ԟyV*ƌT{lSPyJB5k^)u`q BA\|+7=uKɿG+6\|4W0,M ,놴x)L(g8~ -܃Wy~vNd!{L*BlSrb؆R090R ?p큗 TF7{,P ,26 3`)@`їRN^ TY=eU!(2ɮA99JG(M=zL)/ {W^q)JNh3K'#UℒHdҒ4:t3皅LiMiI!7 |9BA*c3@J)[R&2k*S.gMY1m(wPtdl*PI(e#8M)oS©۝Q7t?Cd Լ:ct 1EӜ/v-ϼ$Z]|w)OWц BA2jh~(879]=pn r%FT= Pp Pp Pp Pp Pp E uMM<aVՅ29;R BAjPm֛„MF)8J)Q! 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* The Memento pattern is implemented with three objects: the originator, a caretaker and a memento. * The originator is some object that has an internal state. The caretaker is going to do something * to the originator, but wants to be able to undo the change. The caretaker first asks the * originator for a memento object. Then it does whatever operation (or sequence of operations) it * was going to do. To roll back to the state before the operations, it returns the memento object * to the originator. The memento object itself is an opaque object (one which the caretaker cannot, * or should not, change). When using this pattern, care should be taken if the originator may * change other objects or resources - the memento pattern operates on a single object. *

* In this example the object ({@link Star}) gives out a "memento" ({@link StarMemento}) that * contains the state of the object. Later on the memento can be set back to the object restoring * the state. * */ public class App { /** * Program entry point */ public static void main(String[] args) { Stack states = new Stack<>(); Star star = new Star(StarType.SUN, 10000000, 500000); System.out.println(star); states.add(star.getMemento()); star.timePasses(); System.out.println(star); states.add(star.getMemento()); star.timePasses(); System.out.println(star); states.add(star.getMemento()); star.timePasses(); System.out.println(star); states.add(star.getMemento()); star.timePasses(); System.out.println(star); while (states.size() > 0) { star.setMemento(states.pop()); System.out.println(star); } } } java-design-patterns-1.9.0/memento/src/main/java/com/iluwatar/memento/Star.java000066400000000000000000000041021264154357600275070ustar00rootroot00000000000000package com.iluwatar.memento; /** * * Star uses "mementos" to store and restore state. * */ public class Star { private StarType type; private int ageYears; private int massTons; /** * Constructor */ public Star(StarType startType, int startAge, int startMass) { this.type = startType; this.ageYears = startAge; this.massTons = startMass; } /** * Makes time pass for the star */ public void timePasses() { ageYears *= 2; massTons *= 8; switch (type) { case RED_GIANT: type = StarType.WHITE_DWARF; break; case SUN: type = StarType.RED_GIANT; break; case SUPERNOVA: type = StarType.DEAD; break; case WHITE_DWARF: type = StarType.SUPERNOVA; break; case DEAD: ageYears *= 2; massTons = 0; break; default: break; } } StarMemento getMemento() { StarMementoInternal state = new StarMementoInternal(); state.setAgeYears(ageYears); state.setMassTons(massTons); state.setType(type); return state; } void setMemento(StarMemento memento) { StarMementoInternal state = (StarMementoInternal) memento; this.type = state.getType(); this.ageYears = state.getAgeYears(); this.massTons = state.getMassTons(); } @Override public String toString() { return String.format("%s age: %d years mass: %d tons", type.toString(), ageYears, massTons); } /** * * StarMemento implementation * */ private static class StarMementoInternal implements StarMemento { private StarType type; private int ageYears; private int massTons; public StarType getType() { return type; } public void setType(StarType type) { this.type = type; } public int getAgeYears() { return ageYears; } public void setAgeYears(int ageYears) { this.ageYears = ageYears; } public int getMassTons() { return massTons; } public void setMassTons(int massTons) { this.massTons = massTons; } } } java-design-patterns-1.9.0/memento/src/main/java/com/iluwatar/memento/StarMemento.java000066400000000000000000000001751264154357600310420ustar00rootroot00000000000000package com.iluwatar.memento; /** * * External interface to memento. * */ public interface StarMemento { } java-design-patterns-1.9.0/memento/src/main/java/com/iluwatar/memento/StarType.java000066400000000000000000000005641264154357600303610ustar00rootroot00000000000000package com.iluwatar.memento; /** * * StarType enumeration * */ public enum StarType { SUN("sun"), RED_GIANT("red giant"), WHITE_DWARF("white dwarf"), SUPERNOVA("supernova"), DEAD( "dead star"), UNDEFINED(""); private String title; StarType(String title) { this.title = title; } @Override public String toString() { return title; } } java-design-patterns-1.9.0/memento/src/test/000077500000000000000000000000001264154357600207765ustar00rootroot00000000000000java-design-patterns-1.9.0/memento/src/test/java/000077500000000000000000000000001264154357600217175ustar00rootroot00000000000000java-design-patterns-1.9.0/memento/src/test/java/com/000077500000000000000000000000001264154357600224755ustar00rootroot00000000000000java-design-patterns-1.9.0/memento/src/test/java/com/iluwatar/000077500000000000000000000000001264154357600243255ustar00rootroot00000000000000java-design-patterns-1.9.0/memento/src/test/java/com/iluwatar/memento/000077500000000000000000000000001264154357600257715ustar00rootroot00000000000000java-design-patterns-1.9.0/memento/src/test/java/com/iluwatar/memento/AppTest.java000066400000000000000000000003031264154357600302100ustar00rootroot00000000000000package com.iluwatar.memento; import org.junit.Test; /** * * Application test * */ public class AppTest { @Test public void test() { String[] args = {}; App.main(args); } } java-design-patterns-1.9.0/memento/src/test/java/com/iluwatar/memento/StarTest.java000066400000000000000000000042361264154357600304120ustar00rootroot00000000000000package com.iluwatar.memento; import org.junit.Test; import static org.junit.Assert.assertEquals; /** * Date: 12/20/15 - 10:08 AM * * @author Jeroen Meulemeester */ public class StarTest { /** * Verify the stages of a dying sun, without going back in time */ @Test public void testTimePasses() { final Star star = new Star(StarType.SUN, 1, 2); assertEquals("sun age: 1 years mass: 2 tons", star.toString()); star.timePasses(); assertEquals("red giant age: 2 years mass: 16 tons", star.toString()); star.timePasses(); assertEquals("white dwarf age: 4 years mass: 128 tons", star.toString()); star.timePasses(); assertEquals("supernova age: 8 years mass: 1024 tons", star.toString()); star.timePasses(); assertEquals("dead star age: 16 years mass: 8192 tons", star.toString()); star.timePasses(); assertEquals("dead star age: 64 years mass: 0 tons", star.toString()); star.timePasses(); assertEquals("dead star age: 256 years mass: 0 tons", star.toString()); } /** * Verify some stage of a dying sun, but go back in time to test the memento */ @Test public void testSetMemento() { final Star star = new Star(StarType.SUN, 1, 2); final StarMemento firstMemento = star.getMemento(); assertEquals("sun age: 1 years mass: 2 tons", star.toString()); star.timePasses(); final StarMemento secondMemento = star.getMemento(); assertEquals("red giant age: 2 years mass: 16 tons", star.toString()); star.timePasses(); final StarMemento thirdMemento = star.getMemento(); assertEquals("white dwarf age: 4 years mass: 128 tons", star.toString()); star.timePasses(); assertEquals("supernova age: 8 years mass: 1024 tons", star.toString()); star.setMemento(thirdMemento); assertEquals("white dwarf age: 4 years mass: 128 tons", star.toString()); star.timePasses(); assertEquals("supernova age: 8 years mass: 1024 tons", star.toString()); star.setMemento(secondMemento); assertEquals("red giant age: 2 years mass: 16 tons", star.toString()); star.setMemento(firstMemento); assertEquals("sun age: 1 years mass: 2 tons", star.toString()); } } java-design-patterns-1.9.0/message-channel/000077500000000000000000000000001264154357600206165ustar00rootroot00000000000000java-design-patterns-1.9.0/message-channel/.gitignore000066400000000000000000000000111264154357600225760ustar00rootroot00000000000000/target/ java-design-patterns-1.9.0/message-channel/etc/000077500000000000000000000000001264154357600213715ustar00rootroot00000000000000java-design-patterns-1.9.0/message-channel/etc/message-channel.png000066400000000000000000001341601264154357600251360ustar00rootroot00000000000000PNG  IHDR'<87IDATxmkW}7{GWWΛo#:T3V91R ԁBNkpӓ'0V& z"*L4UJEf^{`{O#k-%39SQ./T'] ?HBРAz@uTH뽌ayAI,YA@YCgt#4XF遲SA!Fh$d e˟ICHb "L*?Ē54HE :T^usD !V Hh =Pa* ԡF{a]t1:i54}44HEu>эp=Jt0k\<~=F' 1F/F遲S5;\{:mzٮ0O"'侨exq8\4HI<4}4h(0YP#ذ1vzWU7;&F2]4BIlmmU* ucFTackg4|ϴN(0+oXCW}_sT3y+ŹZcqͺ(Y_Q\ck#(eW?Q?cV*![p'[ΎV LHT37Dq%'_4 <,T:>_?zk̋|wI^ܰáƕ6W%To8uYT>hpݣm̊PW/j׵KBf^i[YM:ೌ1^7ob/g`6>H(۩ݒIfRJ4 wj,~nO3)B7n\Go]_g jSQrv?_i^{7} &/ͯM77,;ug#sE^!|ӜGBR*`4]#GT%[[b]c!Rch_H-Já(F7\F d%y}tgqwAf^砭ͼ6>W8enKXZ|qUzuHIns}MU)js6A Zl hez59x,BFpubcŃdP{Yo]5l[G>TW%xV^i_17<+]wjL^ɛqejPLo{YRi:i̫(@1)MH{>NRe?~͈jUQj/fC D~X4F ĖpPŃ¯CfwYNښy0ӊe֍$M)@̋Kur) AC}P1:`*fܡİܠ:0S G<֡Z82|bBu:Wwΐi 1цT֪q1 EK@!sCgI,YvfJTvw( ܣIbj{X :W :T,ĒfXL+L*?Cu@Hb+L*?Cu@Hb+L*?Cu@HbZ@SkՠXYYQնE~$]9pйTC2ڿoK_9רXWFµ? 8RO}r6!43vKHiIw>7ڪj w*44b$Fn_Wnu +LEBjT:3 \<[VPrus轝UX!G_*Ahy8q<5WuaWgHFTW2-4b$FOo^x;cuuU,--ɋ˗/ommC`nйT[uuS!YahTWl[F!݌~ї[+='k+rS*~B|Q}?SL: Fh$ihlfY.www QZMy+ъ"ժЏ:W7zdZ' ՟:B:"ƙo$\E2=L~w14b$FϧA_YY8991TB!Hl|κr~2ju/Ji4z_ u6h LEUf)R{rCjUsk.Xiw_MnL1F 1H#IGܠy=h`P`*R:"%2 и4?nآO F.z'g9 2R+Iwэb$F/Ak6JE+BSz٢ X.b$$M_-bFsBS5FO7F 1F@@!HeaS/$:GэXp&P0\a*PbFKUPnX/P: :W :T,Ē1U` #jXh0QsCgI,YOu8@|8vwB S@Rtł@# A+M:: p夳y鬯w_wuNNN$u]֩jfS>{19 %ftj?}l@/..nmm{jjI0;aR( D~N @f`&튯_TbV<+|UzUpȓ%on;z%:myyY fDiCP T@!bC|\qtƽKIϵkDKnZz]a9;! 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+!F*7>}ޗg60dRkw<*u 2|vw}e89Ns5:©[eBjn}E0d&we\]TL/ZVs7=/|xA-qG q?:3;%cow#ߌpס}r\Y)o:o #ԫL_-$aVNb.Tiz$⼮כv\+T<2Ճ@ZT'Å5U'i#g]{ˣP݇Huk.a/ʐ&9:CXlǰBo$0rSknD/'aKnܴ\G]eHPbqǠ b:d Èo[}Dٵk2w1*N̷\G[eHPbyC5bZsa^d,Uo/յ|$}EB¦{Ox3eܸњlugsTQDndY%pAL}_I>a:JL^#3m+4/g<u8ͦ>5潸F3OB5+C|8U$O2q%&?;N\Sމ)D*U$O:'I_bQT{gp4"Dw\GU<Ŝ$}EQ]s:ʔ"'I_bA0#L)r(tc:ʔ"'I_bA0#L)r(33Q#,(T+'q.H\8@;IENDB`java-design-patterns-1.9.0/message-channel/etc/message-channel.ucls000066400000000000000000000436021264154357600253200ustar00rootroot00000000000000 java-design-patterns-1.9.0/message-channel/index.md000066400000000000000000000011331264154357600222450ustar00rootroot00000000000000--- layout: pattern title: Message Channel folder: message-channel permalink: /patterns/message-channel/ categories: Integration tags: - Java - EIP - Camel --- **Intent:** When two applications communicate using a messaging system they do it by using logical addresses of the system, so called Message Channels. ![alt text](./etc/message-channel.png "Message Channel") **Applicability:** Use the Message Channel pattern when * two or more applications need to communicate using a messaging system **Real world examples:** * [akka-camel](http://doc.akka.io/docs/akka/snapshot/scala/camel.html) java-design-patterns-1.9.0/message-channel/pom.xml000066400000000000000000000014611264154357600221350ustar00rootroot00000000000000 4.0.0 com.iluwatar java-design-patterns 1.9.0 message-channel org.apache.camel camel-core org.apache.camel camel-stream junit junit test java-design-patterns-1.9.0/message-channel/src/000077500000000000000000000000001264154357600214055ustar00rootroot00000000000000java-design-patterns-1.9.0/message-channel/src/main/000077500000000000000000000000001264154357600223315ustar00rootroot00000000000000java-design-patterns-1.9.0/message-channel/src/main/java/000077500000000000000000000000001264154357600232525ustar00rootroot00000000000000java-design-patterns-1.9.0/message-channel/src/main/java/com/000077500000000000000000000000001264154357600240305ustar00rootroot00000000000000java-design-patterns-1.9.0/message-channel/src/main/java/com/iluwatar/000077500000000000000000000000001264154357600256605ustar00rootroot00000000000000java-design-patterns-1.9.0/message-channel/src/main/java/com/iluwatar/message/000077500000000000000000000000001264154357600273045ustar00rootroot00000000000000java-design-patterns-1.9.0/message-channel/src/main/java/com/iluwatar/message/channel/000077500000000000000000000000001264154357600307145ustar00rootroot00000000000000java-design-patterns-1.9.0/message-channel/src/main/java/com/iluwatar/message/channel/App.java000066400000000000000000000040351264154357600323010ustar00rootroot00000000000000package com.iluwatar.message.channel; import org.apache.camel.CamelContext; import org.apache.camel.builder.RouteBuilder; import org.apache.camel.impl.DefaultCamelContext; /** * * When two applications communicate with each other using a messaging system they first need to * establish a communication channel that will carry the data. Message Channel decouples Message * producers and consumers. *

* The sending application doesn't necessarily know what particular application will end up * retrieving it, but it can be assured that the application that retrieves the information is * interested in that information. This is because the messaging system has different Message * Channels for different types of information the applications want to communicate. When an * application sends information, it doesn't randomly add the information to any channel available; * it adds it to a channel whose specific purpose is to communicate that sort of information. * Likewise, an application that wants to receive particular information doesn't pull info off some * random channel; it selects what channel to get information from based on what type of information * it wants. *

* In this example we use Apache Camel to establish two different Message Channels. The first one * reads from standard input and delivers messages to Direct endpoint. The second Message Channel is * established from the Direct component to console output. No actual messages are sent, only the * established routes are printed to standard output. * */ public class App { /** * Program entry point */ public static void main(String[] args) throws Exception { CamelContext context = new DefaultCamelContext(); context.addRoutes(new RouteBuilder() { @Override public void configure() throws Exception { from("stream:in").to("direct:greetings"); from("direct:greetings").to("stream:out"); } }); context.start(); context.getRoutes().stream().forEach((r) -> System.out.println(r)); context.stop(); } } java-design-patterns-1.9.0/message-channel/src/test/000077500000000000000000000000001264154357600223645ustar00rootroot00000000000000java-design-patterns-1.9.0/message-channel/src/test/java/000077500000000000000000000000001264154357600233055ustar00rootroot00000000000000java-design-patterns-1.9.0/message-channel/src/test/java/com/000077500000000000000000000000001264154357600240635ustar00rootroot00000000000000java-design-patterns-1.9.0/message-channel/src/test/java/com/iluwatar/000077500000000000000000000000001264154357600257135ustar00rootroot00000000000000java-design-patterns-1.9.0/message-channel/src/test/java/com/iluwatar/message/000077500000000000000000000000001264154357600273375ustar00rootroot00000000000000java-design-patterns-1.9.0/message-channel/src/test/java/com/iluwatar/message/channel/000077500000000000000000000000001264154357600307475ustar00rootroot00000000000000java-design-patterns-1.9.0/message-channel/src/test/java/com/iluwatar/message/channel/AppTest.java000066400000000000000000000003341264154357600331720ustar00rootroot00000000000000package com.iluwatar.message.channel; import org.junit.Test; /** * * Application test * */ public class AppTest { @Test public void test() throws Exception { String[] args = {}; App.main(args); } } java-design-patterns-1.9.0/model-view-controller/000077500000000000000000000000001264154357600220155ustar00rootroot00000000000000java-design-patterns-1.9.0/model-view-controller/etc/000077500000000000000000000000001264154357600225705ustar00rootroot00000000000000java-design-patterns-1.9.0/model-view-controller/etc/model-view-controller.png000066400000000000000000000433221264154357600275330ustar00rootroot00000000000000PNG  IHDR wdFIDATx]$Wy["ZeZٛ LbE0c3 b4q 68Dmh18(7KV R䐛쭮]N:WVW:էWOz!P ]B #PAu/J]q>TNB$A51oh;+\DK.Ht.:֥NԅB% 1"mC0P4IPM%47ҿ~cv16{-Vuk׆e!ƅnXhm#$#'J-|yָЋBmG($&zyL=Ⱦaw>#9c.:ƅ[KETX_ڃ*vMrjq|*o]Gي jIۆ/BM& {NC(Mqp8uo ls.DYc!^y8E$Yf~<>|yFTdul? 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Let the model manage the data, the view display the data and the controller mediate updating the data and redrawing the display. ![alt text](./etc/model-view-controller.png "Model-View-Controller") **Applicability:** Use the Model-View-Controller pattern when * you want to clearly separate the domain data from its user interface representation **Credits:** * [Trygve Reenskaug - Model-view-controller](http://en.wikipedia.org/wiki/Model%E2%80%93view%E2%80%93controller) * [J2EE Design Patterns](http://www.amazon.com/J2EE-Design-Patterns-William-Crawford/dp/0596004273/ref=sr_1_2) * [Patterns of Enterprise Application Architecture](http://www.amazon.com/Patterns-Enterprise-Application-Architecture-Martin/dp/0321127420) java-design-patterns-1.9.0/model-view-controller/pom.xml000066400000000000000000000014041264154357600233310ustar00rootroot00000000000000 4.0.0 com.iluwatar java-design-patterns 1.9.0 model-view-controller junit junit test org.mockito mockito-core test java-design-patterns-1.9.0/model-view-controller/src/000077500000000000000000000000001264154357600226045ustar00rootroot00000000000000java-design-patterns-1.9.0/model-view-controller/src/main/000077500000000000000000000000001264154357600235305ustar00rootroot00000000000000java-design-patterns-1.9.0/model-view-controller/src/main/java/000077500000000000000000000000001264154357600244515ustar00rootroot00000000000000java-design-patterns-1.9.0/model-view-controller/src/main/java/com/000077500000000000000000000000001264154357600252275ustar00rootroot00000000000000java-design-patterns-1.9.0/model-view-controller/src/main/java/com/iluwatar/000077500000000000000000000000001264154357600270575ustar00rootroot00000000000000java-design-patterns-1.9.0/model-view-controller/src/main/java/com/iluwatar/model/000077500000000000000000000000001264154357600301575ustar00rootroot00000000000000java-design-patterns-1.9.0/model-view-controller/src/main/java/com/iluwatar/model/view/000077500000000000000000000000001264154357600311315ustar00rootroot00000000000000java-design-patterns-1.9.0/model-view-controller/src/main/java/com/iluwatar/model/view/controller/000077500000000000000000000000001264154357600333145ustar00rootroot00000000000000App.java000066400000000000000000000031571264154357600346260ustar00rootroot00000000000000java-design-patterns-1.9.0/model-view-controller/src/main/java/com/iluwatar/model/view/controllerpackage com.iluwatar.model.view.controller; /** * * Model-View-Controller is a pattern for implementing user interfaces. It divides the application * into three interconnected parts namely the model, the view and the controller. *

* The central component of MVC, the model, captures the behavior of the application in terms of its * problem domain, independent of the user interface. The model directly manages the data, logic and * rules of the application. A view can be any output representation of information, such as a chart * or a diagram The third part, the controller, accepts input and converts it to commands for the * model or view. *

* In this example we have a giant ({@link GiantModel}) with statuses for health, fatigue and * nourishment. {@link GiantView} can display the giant with its current status. * {@link GiantController} receives input affecting the model and delegates redrawing the giant to * the view. * */ public class App { /** * Program entry point * * @param args command line args */ public static void main(String[] args) { // create model, view and controller GiantModel giant = new GiantModel(Health.HEALTHY, Fatigue.ALERT, Nourishment.SATURATED); GiantView view = new GiantView(); GiantController controller = new GiantController(giant, view); // initial display controller.updateView(); // controller receives some interactions that affect the giant controller.setHealth(Health.WOUNDED); controller.setNourishment(Nourishment.HUNGRY); controller.setFatigue(Fatigue.TIRED); // redisplay controller.updateView(); } } Fatigue.java000066400000000000000000000004641264154357600354700ustar00rootroot00000000000000java-design-patterns-1.9.0/model-view-controller/src/main/java/com/iluwatar/model/view/controllerpackage com.iluwatar.model.view.controller; /** * * Fatigue enumeration * */ public enum Fatigue { ALERT("alert"), TIRED("tired"), SLEEPING("sleeping"); private String title; Fatigue(String title) { this.title = title; } @Override public String toString() { return title; } } GiantController.java000066400000000000000000000015671264154357600372170ustar00rootroot00000000000000java-design-patterns-1.9.0/model-view-controller/src/main/java/com/iluwatar/model/view/controllerpackage com.iluwatar.model.view.controller; /** * * GiantController can update the giant data and redraw it using the view. * */ public class GiantController { private GiantModel giant; private GiantView view; public GiantController(GiantModel giant, GiantView view) { this.giant = giant; this.view = view; } public Health getHealth() { return giant.getHealth(); } public void setHealth(Health health) { this.giant.setHealth(health); } public Fatigue getFatigue() { return giant.getFatigue(); } public void setFatigue(Fatigue fatigue) { this.giant.setFatigue(fatigue); } public Nourishment getNourishment() { return giant.getNourishment(); } public void setNourishment(Nourishment nourishment) { this.giant.setNourishment(nourishment); } public void updateView() { this.view.displayGiant(giant); } } GiantModel.java000066400000000000000000000016571264154357600361340ustar00rootroot00000000000000java-design-patterns-1.9.0/model-view-controller/src/main/java/com/iluwatar/model/view/controllerpackage com.iluwatar.model.view.controller; /** * * GiantModel contains the giant data * */ public class GiantModel { private Health health; private Fatigue fatigue; private Nourishment nourishment; GiantModel(Health health, Fatigue fatigue, Nourishment nourishment) { this.health = health; this.fatigue = fatigue; this.nourishment = nourishment; } public Health getHealth() { return health; } public void setHealth(Health health) { this.health = health; } public Fatigue getFatigue() { return fatigue; } public void setFatigue(Fatigue fatigue) { this.fatigue = fatigue; } public Nourishment getNourishment() { return nourishment; } public void setNourishment(Nourishment nourishment) { this.nourishment = nourishment; } @Override public String toString() { return String.format("The giant looks %s, %s and %s.", health, fatigue, nourishment); } } GiantView.java000066400000000000000000000003121264154357600357710ustar00rootroot00000000000000java-design-patterns-1.9.0/model-view-controller/src/main/java/com/iluwatar/model/view/controllerpackage com.iluwatar.model.view.controller; /** * * GiantView displays the giant * */ public class GiantView { public void displayGiant(GiantModel giant) { System.out.println(giant); } } Health.java000066400000000000000000000004611264154357600353060ustar00rootroot00000000000000java-design-patterns-1.9.0/model-view-controller/src/main/java/com/iluwatar/model/view/controllerpackage com.iluwatar.model.view.controller; /** * * Health enumeration * */ public enum Health { HEALTHY("healthy"), WOUNDED("wounded"), DEAD("dead"); private String title; Health(String title) { this.title = title; } @Override public String toString() { return title; } } Nourishment.java000066400000000000000000000005121264154357600364110ustar00rootroot00000000000000java-design-patterns-1.9.0/model-view-controller/src/main/java/com/iluwatar/model/view/controllerpackage com.iluwatar.model.view.controller; /** * * Nourishment enumeration * */ public enum Nourishment { SATURATED("saturated"), HUNGRY("hungry"), STARVING("starving"); private String title; Nourishment(String title) { this.title = title; } @Override public String toString() { return title; } } java-design-patterns-1.9.0/model-view-controller/src/test/000077500000000000000000000000001264154357600235635ustar00rootroot00000000000000java-design-patterns-1.9.0/model-view-controller/src/test/java/000077500000000000000000000000001264154357600245045ustar00rootroot00000000000000java-design-patterns-1.9.0/model-view-controller/src/test/java/com/000077500000000000000000000000001264154357600252625ustar00rootroot00000000000000java-design-patterns-1.9.0/model-view-controller/src/test/java/com/iluwatar/000077500000000000000000000000001264154357600271125ustar00rootroot00000000000000java-design-patterns-1.9.0/model-view-controller/src/test/java/com/iluwatar/model/000077500000000000000000000000001264154357600302125ustar00rootroot00000000000000java-design-patterns-1.9.0/model-view-controller/src/test/java/com/iluwatar/model/view/000077500000000000000000000000001264154357600311645ustar00rootroot00000000000000java-design-patterns-1.9.0/model-view-controller/src/test/java/com/iluwatar/model/view/controller/000077500000000000000000000000001264154357600333475ustar00rootroot00000000000000AppTest.java000066400000000000000000000003211264154357600355070ustar00rootroot00000000000000java-design-patterns-1.9.0/model-view-controller/src/test/java/com/iluwatar/model/view/controllerpackage com.iluwatar.model.view.controller; import org.junit.Test; /** * * Application test * */ public class AppTest { @Test public void test() { String[] args = {}; App.main(args); } } GiantControllerTest.java000066400000000000000000000052521264154357600401050ustar00rootroot00000000000000java-design-patterns-1.9.0/model-view-controller/src/test/java/com/iluwatar/model/view/controllerpackage com.iluwatar.model.view.controller; import org.junit.Test; import static org.mockito.Mockito.mock; import static org.mockito.Mockito.verify; import static org.mockito.Mockito.verifyNoMoreInteractions; import static org.mockito.Mockito.verifyZeroInteractions; /** * Date: 12/20/15 - 2:19 PM * * @author Jeroen Meulemeester */ public class GiantControllerTest { /** * Verify if the controller passes the health level through to the model and vice versa */ @Test public void testSetHealth() { final GiantModel model = mock(GiantModel.class); final GiantView view = mock(GiantView.class); final GiantController controller = new GiantController(model, view); verifyZeroInteractions(model, view); for (final Health health : Health.values()) { controller.setHealth(health); verify(model).setHealth(health); verifyZeroInteractions(view); } controller.getHealth(); verify(model).getHealth(); verifyNoMoreInteractions(model, view); } /** * Verify if the controller passes the fatigue level through to the model and vice versa */ @Test public void testSetFatigue() { final GiantModel model = mock(GiantModel.class); final GiantView view = mock(GiantView.class); final GiantController controller = new GiantController(model, view); verifyZeroInteractions(model, view); for (final Fatigue fatigue : Fatigue.values()) { controller.setFatigue(fatigue); verify(model).setFatigue(fatigue); verifyZeroInteractions(view); } controller.getFatigue(); verify(model).getFatigue(); verifyNoMoreInteractions(model, view); } /** * Verify if the controller passes the nourishment level through to the model and vice versa */ @Test public void testSetNourishment() { final GiantModel model = mock(GiantModel.class); final GiantView view = mock(GiantView.class); final GiantController controller = new GiantController(model, view); verifyZeroInteractions(model, view); for (final Nourishment nourishment : Nourishment.values()) { controller.setNourishment(nourishment); verify(model).setNourishment(nourishment); verifyZeroInteractions(view); } controller.getNourishment(); verify(model).getNourishment(); verifyNoMoreInteractions(model, view); } @Test public void testUpdateView() { final GiantModel model = mock(GiantModel.class); final GiantView view = mock(GiantView.class); final GiantController controller = new GiantController(model, view); verifyZeroInteractions(model, view); controller.updateView(); verify(view).displayGiant(model); verifyNoMoreInteractions(model, view); } }GiantModelTest.java000066400000000000000000000035301264154357600370170ustar00rootroot00000000000000java-design-patterns-1.9.0/model-view-controller/src/test/java/com/iluwatar/model/view/controllerpackage com.iluwatar.model.view.controller; import org.junit.Test; import static org.junit.Assert.assertEquals; /** * Date: 12/20/15 - 2:10 PM * * @author Jeroen Meulemeester */ public class GiantModelTest { /** * Verify if the health value is set properly though the constructor and setter */ @Test public void testSetHealth() { final GiantModel model = new GiantModel(Health.HEALTHY, Fatigue.ALERT, Nourishment.SATURATED); assertEquals(Health.HEALTHY, model.getHealth()); for (final Health health : Health.values()) { model.setHealth(health); assertEquals(health, model.getHealth()); assertEquals("The giant looks " + health.toString() + ", alert and saturated.", model.toString()); } } /** * Verify if the fatigue level is set properly though the constructor and setter */ @Test public void testSetFatigue() { final GiantModel model = new GiantModel(Health.HEALTHY, Fatigue.ALERT, Nourishment.SATURATED); assertEquals(Fatigue.ALERT, model.getFatigue()); for (final Fatigue fatigue : Fatigue.values()) { model.setFatigue(fatigue); assertEquals(fatigue, model.getFatigue()); assertEquals("The giant looks healthy, " + fatigue.toString() + " and saturated.", model.toString()); } } /** * Verify if the nourishment level is set properly though the constructor and setter */ @Test public void testSetNourishment() { final GiantModel model = new GiantModel(Health.HEALTHY, Fatigue.ALERT, Nourishment.SATURATED); assertEquals(Nourishment.SATURATED, model.getNourishment()); for (final Nourishment nourishment : Nourishment.values()) { model.setNourishment(nourishment); assertEquals(nourishment, model.getNourishment()); assertEquals("The giant looks healthy, alert and " + nourishment.toString() + ".", model.toString()); } } } GiantViewTest.java000066400000000000000000000031221264154357600366660ustar00rootroot00000000000000java-design-patterns-1.9.0/model-view-controller/src/test/java/com/iluwatar/model/view/controllerpackage com.iluwatar.model.view.controller; import org.junit.After; import org.junit.Before; import org.junit.Test; import java.io.PrintStream; import static org.mockito.Mockito.mock; import static org.mockito.Mockito.verify; import static org.mockito.Mockito.verifyNoMoreInteractions; /** * Date: 12/20/15 - 2:04 PM * * @author Jeroen Meulemeester */ public class GiantViewTest { /** * The mocked standard out {@link PrintStream}, required since the actions of the views don't have * any influence on any other accessible objects, except for writing to std-out using {@link * System#out} */ private final PrintStream stdOutMock = mock(PrintStream.class); /** * Keep the original std-out so it can be restored after the test */ private final PrintStream stdOutOrig = System.out; /** * Inject the mocked std-out {@link PrintStream} into the {@link System} class before each test */ @Before public void setUp() { System.setOut(this.stdOutMock); } /** * Removed the mocked std-out {@link PrintStream} again from the {@link System} class */ @After public void tearDown() { System.setOut(this.stdOutOrig); } /** * Verify if the {@link GiantView} does what it has to do: Print the {@link GiantModel} to the * standard out stream, nothing more, nothing less. */ @Test public void testDisplayGiant() { final GiantView view = new GiantView(); final GiantModel model = mock(GiantModel.class); view.displayGiant(model); verify(this.stdOutMock).println(model); verifyNoMoreInteractions(model, this.stdOutMock); } }java-design-patterns-1.9.0/model-view-presenter/000077500000000000000000000000001264154357600216415ustar00rootroot00000000000000java-design-patterns-1.9.0/model-view-presenter/etc/000077500000000000000000000000001264154357600224145ustar00rootroot00000000000000java-design-patterns-1.9.0/model-view-presenter/etc/data/000077500000000000000000000000001264154357600233255ustar00rootroot00000000000000java-design-patterns-1.9.0/model-view-presenter/etc/data/test.txt000066400000000000000000000000271264154357600250440ustar00rootroot00000000000000Test line 1 Test line 2java-design-patterns-1.9.0/model-view-presenter/etc/model-view-presenter.png000066400000000000000000001214721264154357600272060ustar00rootroot00000000000000PNG  IHDR4hIDATxm-Y+!% 5p+7b̡lKuHl8 cŸ-N,%)B968 `y]%׸g™!¤w\ϵyꩩ=Wzz^>9 rqZ^~ B|ľE A@8GB@& =4!N ' qA8UhmV)&;  "{JSe~Fyqv q=%IE99,ݙNOSC%+C'Iŗr]sq՜wyGBdBّn qD pA ~2Zo㋉Od>w|{U5+2n@t#u&7t*? 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This is accomplished by separating the application's * logic (Model), GUIs (View), and finally the way that the user's actions update the application's * logic (Presenter). *

* In the following example, The {@link FileLoader} class represents the app's logic, the * {@link FileSelectorJFrame} is the GUI and the {@link FileSelectorPresenter} is responsible to * respond to users' actions. *

* Finally, please notice the wiring between the Presenter and the View and between the Presenter * and the Model. * */ public class App { /** * Program entry point * * @param args command line args */ public static void main(String[] args) { FileLoader loader = new FileLoader(); FileSelectorJFrame jFrame = new FileSelectorJFrame(); FileSelectorPresenter presenter = new FileSelectorPresenter(jFrame); presenter.setLoader(loader); presenter.start(); } } FileLoader.java000066400000000000000000000032121264154357600355540ustar00rootroot00000000000000java-design-patterns-1.9.0/model-view-presenter/src/main/java/com/iluwatar/model/view/presenterpackage com.iluwatar.model.view.presenter; import java.io.BufferedReader; import java.io.File; import java.io.FileReader; /** * Every instance of this class represents the Model component in the Model-View-Presenter * architectural pattern. *

* It is responsible for reading and loading the contents of a given file. */ public class FileLoader { /** * Indicates if the file is loaded or not. */ private boolean loaded = false; /** * The name of the file that we want to load. */ private String fileName; /** * Loads the data of the file specified. */ public String loadData() { try { BufferedReader br = new BufferedReader(new FileReader(new File(this.fileName))); StringBuilder sb = new StringBuilder(); String line; while ((line = br.readLine()) != null) { sb.append(line).append('\n'); } this.loaded = true; br.close(); return sb.toString(); } catch (Exception e) { e.printStackTrace(); } return null; } /** * Sets the path of the file to be loaded, to the given value. * * @param fileName The path of the file to be loaded. */ public void setFileName(String fileName) { this.fileName = fileName; } /** * @return fileName The path of the file to be loaded. */ public String getFileName() { return this.fileName; } /** * @return True, if the file given exists, false otherwise. */ public boolean fileExists() { return new File(this.fileName).exists(); } /** * @return True, if the file is loaded, false otherwise. */ public boolean isLoaded() { return this.loaded; } } FileSelectorJFrame.java000066400000000000000000000102241264154357600372140ustar00rootroot00000000000000java-design-patterns-1.9.0/model-view-presenter/src/main/java/com/iluwatar/model/view/presenterpackage com.iluwatar.model.view.presenter; import java.awt.Color; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JOptionPane; import javax.swing.JPanel; import javax.swing.JScrollPane; import javax.swing.JTextArea; import javax.swing.JTextField; /** * This class is the GUI implementation of the View component in the Model-View-Presenter pattern. */ public class FileSelectorJFrame extends JFrame implements FileSelectorView, ActionListener { /** * Default serial version ID. */ private static final long serialVersionUID = 1L; /** * The "OK" button for loading the file. */ private JButton ok; /** * The cancel button. */ private JButton cancel; /** * The information label. */ private JLabel info; /** * The contents label. */ private JLabel contents; /** * The text field for giving the name of the file that we want to open. */ private JTextField input; /** * A text area that will keep the contents of the file opened. */ private JTextArea area; /** * The panel that will hold our widgets. */ private JPanel panel; /** * The Presenter component that the frame will interact with */ private FileSelectorPresenter presenter; /** * The name of the file that we want to read it's contents. */ private String fileName; /** * Constructor. */ public FileSelectorJFrame() { super("File Loader"); this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); this.setLayout(null); this.setBounds(100, 100, 500, 200); /* * Add the panel. */ this.panel = new JPanel(); panel.setLayout(null); this.add(panel); panel.setBounds(0, 0, 500, 200); panel.setBackground(Color.LIGHT_GRAY); /* * Add the info label. */ this.info = new JLabel("File Name :"); this.panel.add(info); info.setBounds(30, 10, 100, 30); /* * Add the contents label. */ this.contents = new JLabel("File contents :"); this.panel.add(contents); this.contents.setBounds(30, 100, 120, 30); /* * Add the text field. */ this.input = new JTextField(100); this.panel.add(input); this.input.setBounds(150, 15, 200, 20); /* * Add the text area. */ this.area = new JTextArea(100, 100); JScrollPane pane = new JScrollPane(area); pane.setHorizontalScrollBarPolicy(JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED); pane.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED); this.panel.add(pane); this.area.setEditable(false); pane.setBounds(150, 100, 250, 80); /* * Add the OK button. */ this.ok = new JButton("OK"); this.panel.add(ok); this.ok.setBounds(250, 50, 100, 25); this.ok.addActionListener(this); /* * Add the cancel button. */ this.cancel = new JButton("Cancel"); this.panel.add(this.cancel); this.cancel.setBounds(380, 50, 100, 25); this.cancel.addActionListener(this); this.presenter = null; this.fileName = null; } @Override public void actionPerformed(ActionEvent e) { if (this.ok.equals(e.getSource())) { this.fileName = this.input.getText(); presenter.fileNameChanged(); presenter.confirmed(); } else if (this.cancel.equals(e.getSource())) { presenter.cancelled(); } } @Override public void open() { this.setVisible(true); } @Override public void close() { this.dispose(); } @Override public boolean isOpened() { return this.isVisible(); } @Override public void setPresenter(FileSelectorPresenter presenter) { this.presenter = presenter; } @Override public FileSelectorPresenter getPresenter() { return this.presenter; } @Override public void setFileName(String name) { this.fileName = name; } @Override public String getFileName() { return this.fileName; } @Override public void showMessage(String message) { JOptionPane.showMessageDialog(null, message); } @Override public void displayData(String data) { this.area.setText(data); } } FileSelectorPresenter.java000066400000000000000000000033231264154357600400210ustar00rootroot00000000000000java-design-patterns-1.9.0/model-view-presenter/src/main/java/com/iluwatar/model/view/presenterpackage com.iluwatar.model.view.presenter; /** * Every instance of this class represents the Presenter component in the Model-View-Presenter * architectural pattern. *

* It is responsible for reacting to the user's actions and update the View component. */ public class FileSelectorPresenter { /** * The View component that the presenter interacts with. */ private FileSelectorView view; /** * The Model component that the presenter interacts with. */ private FileLoader loader; /** * Constructor * * @param view The view component that the presenter will interact with. */ public FileSelectorPresenter(FileSelectorView view) { this.view = view; } /** * Sets the {@link FileLoader} object, to the value given as parameter. * * @param loader The new {@link FileLoader} object(the Model component). */ public void setLoader(FileLoader loader) { this.loader = loader; } /** * Starts the presenter. */ public void start() { view.setPresenter(this); view.open(); } /** * An "event" that fires when the name of the file to be loaded changes. */ public void fileNameChanged() { loader.setFileName(view.getFileName()); } /** * Ok button handler */ public void confirmed() { if (loader.getFileName() == null || loader.getFileName().equals("")) { view.showMessage("Please give the name of the file first!"); return; } if (loader.fileExists()) { String data = loader.loadData(); view.displayData(data); } else { view.showMessage("The file specified does not exist."); } } /** * Cancels the file loading process. */ public void cancelled() { view.close(); } } FileSelectorStub.java000066400000000000000000000042621264154357600367720ustar00rootroot00000000000000java-design-patterns-1.9.0/model-view-presenter/src/main/java/com/iluwatar/model/view/presenterpackage com.iluwatar.model.view.presenter; /** * Every instance of this class represents the Stub component in the Model-View-Presenter * architectural pattern. *

* The stub implements the View interface and it is useful when we want the test the reaction to * user events, such as mouse clicks. *

* Since we can not test the GUI directly, the MVP pattern provides this functionality through the * View's dummy implementation, the Stub. */ public class FileSelectorStub implements FileSelectorView { /** * Indicates whether or not the view is opened. */ private boolean opened; /** * The presenter Component. */ private FileSelectorPresenter presenter; /** * The current name of the file. */ private String name; /** * Indicates the number of messages that were "displayed" to the user. */ private int numOfMessageSent; /** * Indicates if the data of the file where displayed or not. */ private boolean dataDisplayed; /** * Constructor */ public FileSelectorStub() { this.opened = false; this.presenter = null; this.name = ""; this.numOfMessageSent = 0; this.dataDisplayed = false; } @Override public void open() { this.opened = true; } @Override public void setPresenter(FileSelectorPresenter presenter) { this.presenter = presenter; } @Override public boolean isOpened() { return this.opened; } @Override public FileSelectorPresenter getPresenter() { return this.presenter; } @Override public String getFileName() { return this.name; } @Override public void setFileName(String name) { this.name = name; } @Override public void showMessage(String message) { this.numOfMessageSent++; } @Override public void close() { this.opened = false; } @Override public void displayData(String data) { this.dataDisplayed = true; } /** * Returns the number of messages that were displayed to the user. */ public int getMessagesSent() { return this.numOfMessageSent; } /** * @return True if the data where displayed, false otherwise. */ public boolean dataDisplayed() { return this.dataDisplayed; } } FileSelectorView.java000066400000000000000000000023031264154357600367610ustar00rootroot00000000000000java-design-patterns-1.9.0/model-view-presenter/src/main/java/com/iluwatar/model/view/presenterpackage com.iluwatar.model.view.presenter; /** * This interface represents the View component in the Model-View-Presenter pattern. It can be * implemented by either the GUI components, or by the Stub. */ public interface FileSelectorView { /** * Opens the view. */ void open(); /** * Closes the view. */ void close(); /** * @return True, if the view is opened, false otherwise. */ boolean isOpened(); /** * Sets the presenter component, to the one given as parameter. * * @param presenter The new presenter component. */ void setPresenter(FileSelectorPresenter presenter); /** * @return The presenter Component. */ FileSelectorPresenter getPresenter(); /** * Sets the file's name, to the value given as parameter. * * @param name The new name of the file. */ void setFileName(String name); /** * @return The name of the file. */ String getFileName(); /** * Displays a message to the users. * * @param message The message to be displayed. */ void showMessage(String message); /** * Displays the data to the view. * * @param data The data to be written. */ void displayData(String data); } java-design-patterns-1.9.0/model-view-presenter/src/test/000077500000000000000000000000001264154357600234075ustar00rootroot00000000000000java-design-patterns-1.9.0/model-view-presenter/src/test/java/000077500000000000000000000000001264154357600243305ustar00rootroot00000000000000java-design-patterns-1.9.0/model-view-presenter/src/test/java/com/000077500000000000000000000000001264154357600251065ustar00rootroot00000000000000java-design-patterns-1.9.0/model-view-presenter/src/test/java/com/iluwatar/000077500000000000000000000000001264154357600267365ustar00rootroot00000000000000java-design-patterns-1.9.0/model-view-presenter/src/test/java/com/iluwatar/model/000077500000000000000000000000001264154357600300365ustar00rootroot00000000000000java-design-patterns-1.9.0/model-view-presenter/src/test/java/com/iluwatar/model/view/000077500000000000000000000000001264154357600310105ustar00rootroot00000000000000java-design-patterns-1.9.0/model-view-presenter/src/test/java/com/iluwatar/model/view/presenter/000077500000000000000000000000001264154357600330175ustar00rootroot00000000000000AppTest.java000066400000000000000000000003211264154357600351570ustar00rootroot00000000000000java-design-patterns-1.9.0/model-view-presenter/src/test/java/com/iluwatar/model/view/presenterpackage com.iluwatar.model.view.presenter; import org.junit.Test; /** * * Application test * */ public class AppTest { @Test public void test() { String[] args = {}; App.main(args); } } FileLoaderTest.java000066400000000000000000000006401264154357600364510ustar00rootroot00000000000000java-design-patterns-1.9.0/model-view-presenter/src/test/java/com/iluwatar/model/view/presenterpackage com.iluwatar.model.view.presenter; import org.junit.Test; import static org.junit.Assert.assertNull; /** * Date: 12/21/15 - 12:12 PM * * @author Jeroen Meulemeester */ public class FileLoaderTest { @Test public void testLoadData() throws Exception { final FileLoader fileLoader = new FileLoader(); fileLoader.setFileName("non-existing-file"); assertNull(fileLoader.loadData()); } }FileSelectorPresenterTest.java000066400000000000000000000053341264154357600407200ustar00rootroot00000000000000java-design-patterns-1.9.0/model-view-presenter/src/test/java/com/iluwatar/model/view/presenterpackage com.iluwatar.model.view.presenter; import static org.junit.Assert.assertEquals; import static org.junit.Assert.assertFalse; import static org.junit.Assert.assertNotNull; import static org.junit.Assert.assertTrue; import org.junit.Before; import org.junit.Test; /** * This test case is responsible for testing our application by taking advantage of the * Model-View-Controller architectural pattern. */ public class FileSelectorPresenterTest { /** * The Presenter component. */ private FileSelectorPresenter presenter; /** * The View component, implemented this time as a Stub!!! */ private FileSelectorStub stub; /** * The Model component. */ private FileLoader loader; /** * Initializes the components of the test case. */ @Before public void setUp() { this.stub = new FileSelectorStub(); this.loader = new FileLoader(); presenter = new FileSelectorPresenter(this.stub); presenter.setLoader(loader); } /** * Tests if the Presenter was successfully connected with the View. */ @Test public void wiring() { presenter.start(); assertNotNull(stub.getPresenter()); assertTrue(stub.isOpened()); } /** * Tests if the name of the file changes. */ @Test public void updateFileNameToLoader() { String expectedFile = "Stamatis"; stub.setFileName(expectedFile); presenter.start(); presenter.fileNameChanged(); assertEquals(expectedFile, loader.getFileName()); } /** * Tests if we receive a confirmation when we attempt to open a file that it's name is null or an * empty string. */ @Test public void fileConfirmationWhenNameIsNull() { stub.setFileName(null); presenter.start(); presenter.fileNameChanged(); presenter.confirmed(); assertFalse(loader.isLoaded()); assertEquals(1, stub.getMessagesSent()); } /** * Tests if we receive a confirmation when we attempt to open a file that it doesn't exist. */ @Test public void fileConfirmationWhenFileDoesNotExist() { stub.setFileName("RandomName.txt"); presenter.start(); presenter.fileNameChanged(); presenter.confirmed(); assertFalse(loader.isLoaded()); assertEquals(1, stub.getMessagesSent()); } /** * Tests if we can open the file, when it exists. */ @Test public void fileConfirmationWhenFileExists() { stub.setFileName("etc/data/test.txt"); presenter.start(); presenter.fileNameChanged(); presenter.confirmed(); assertTrue(loader.isLoaded()); assertTrue(stub.dataDisplayed()); } /** * Tests if the view closes after cancellation. */ @Test public void cancellation() { presenter.start(); presenter.cancelled(); assertFalse(stub.isOpened()); } } java-design-patterns-1.9.0/monostate/000077500000000000000000000000001264154357600175755ustar00rootroot00000000000000java-design-patterns-1.9.0/monostate/etc/000077500000000000000000000000001264154357600203505ustar00rootroot00000000000000java-design-patterns-1.9.0/monostate/etc/MonoState.ucls000066400000000000000000000063331264154357600231560ustar00rootroot00000000000000 java-design-patterns-1.9.0/monostate/etc/monostate.png000066400000000000000000000402161264154357600230720ustar00rootroot00000000000000PNG  IHDR":@UIDATx XGǓ$j4k7WAPQ9ROT<≷F xED<(*I7nb>5&f5g335=yV[@",gԾI"H$=CҨTl^$0d3Œf7Œf7Œf7Œf*&-qrU֭WkWJށFaƃ?6`݄%-w2ij6fsOK izԤf<Ȫ%萘2Oo;}^VGgEכ#%/zMP~M5gN$;&5NaT7of.a!،i˕]ow]4h9ڷoz+WNCOT3KLf}WG pc۵xRWHXt!>'{N3ى5{. ];jTX׷?`%/ZJe?)f1QÆuaʃH1S=u*{,Ν-wwopG|X-[]C֭iQ 3d=̂-." g6`̮^ͩ\k]Rƌ6>w. =<͚͝ >l6nhAA^RPʕO/]ʊM6RAD={v ֮] >ϟ0wϞ%W^FV} 3NdUo*˴t@"_ea>]a'ҷdY36$qolݱc^z=I`Gǚ7%[#<^ aW2z"bf|/ҿ󊆞!2Q֐u:f aqOBׁkFݼ} {G֌ [1fK֬y+m/b+1i߾wRd6n\1@Ezh_~٥ "HJ1[rF nҥ.^\+ 8=_!xU4֛c1]A,Iz"afW,^p!>*F123aƃԙc(}.싿МF aƃhƍ0Aƍ0Aƍ0Aƍ0Aƍ0Aƍ0A\ch˖[pcF 1cVj~aPqo/F bVTۥOX[ލ{{ 1[m9؜93cѢS m% %`Q իEZ-v?iRftժ*gl~=GF"(ҥ;5طo,o,.Cyz=*־}ղ;"ΝÆN-ǁ>}ڣG)LK,f wq˗O&ixxƍ/bţ|(}{"#;=.Y2)--ﶱy(l䬬$:d8/ڷxCw c0yr?޸O@Щ|l⚑8xp=3m˲]J'ϟj 7>~6̉dA+{~M)m6HV| aúT۴,?)fz/-.[O>׷ر==lb1=l1aaY3g%C=}z#d?GFD \9 *tF? gҩSk삓ٲ%VER.X0:;{z|13t 3'ֱ72 ZZ摟ysŋ; 3m˲aӽ?\ a;F\j^x0[@&\zn'co6n̿u"J+hM6IOO|W<0t 3O?'lllOS%CiU6𤑬,F LF LF LF LF0#iR*6/y3aƃ3aƃ3aƃJpccs!~{"k*%fzP=5Œ'R=5ŒӸo2BBZ?LYR80ALN! 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See the NOTICE file distributed with this work for additional information regarding * copyright ownership. The ASF licenses this file to you under the Apache License, Version 2.0 (the * "License"); you may not use this file except in compliance with the License. You may obtain a * copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software distributed under the License * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express * or implied. See the License for the specific language governing permissions and limitations under * the License. */ package domainapp.dom.app.homepage; import org.apache.isis.applib.DomainObjectContainer; import org.apache.isis.applib.annotation.Action; import org.apache.isis.applib.annotation.DomainService; import org.apache.isis.applib.annotation.HomePage; import org.apache.isis.applib.annotation.NatureOfService; import org.apache.isis.applib.annotation.SemanticsOf; @DomainService(nature = NatureOfService.VIEW_CONTRIBUTIONS_ONLY) public class HomePageService { // region > homePage (action) @Action(semantics = SemanticsOf.SAFE) @HomePage public HomePageViewModel homePage() { return container.injectServicesInto(new HomePageViewModel()); } // endregion // region > injected services @javax.inject.Inject DomainObjectContainer container; // endregion } HomePageViewModel.java000066400000000000000000000026521264154357600346760ustar00rootroot00000000000000java-design-patterns-1.9.0/naked-objects/dom/src/main/java/domainapp/dom/app/homepage/* * Licensed to the Apache Software Foundation (ASF) under one or more contributor license * agreements. See the NOTICE file distributed with this work for additional information regarding * copyright ownership. The ASF licenses this file to you under the Apache License, Version 2.0 (the * "License"); you may not use this file except in compliance with the License. You may obtain a * copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software distributed under the License * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express * or implied. See the License for the specific language governing permissions and limitations under * the License. */ package domainapp.dom.app.homepage; import java.util.List; import org.apache.isis.applib.annotation.ViewModel; import domainapp.dom.modules.simple.SimpleObject; import domainapp.dom.modules.simple.SimpleObjects; @ViewModel public class HomePageViewModel { // region > title public String title() { return getObjects().size() + " objects"; } // endregion // region > object (collection) @org.apache.isis.applib.annotation.HomePage public List getObjects() { return simpleObjects.listAll(); } // endregion // region > injected services @javax.inject.Inject SimpleObjects simpleObjects; // endregion } HomePageViewModel.layout.json000066400000000000000000000024561264154357600362440ustar00rootroot00000000000000java-design-patterns-1.9.0/naked-objects/dom/src/main/java/domainapp/dom/app/homepage/** * Licensed to the Apache Software Foundation (ASF) under one or more * contributor license agreements. See the NOTICE file distributed with * this work for additional information regarding copyright ownership. * The ASF licenses this file to You under the Apache License, Version 2.0 * (the "License"); you may not use this file except in compliance with * the License. You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ { "columns": [ { "span": 0, "memberGroups": {} }, { "span": 0, "memberGroups": {} }, { "span": 0, "memberGroups": {} }, { "span": 12, "collections": { "objects": { "collectionLayout": { "render": "EAGERLY" } } } } ], "actions": {} }HomePageViewModel.png000066400000000000000000000007101264154357600345320ustar00rootroot00000000000000java-design-patterns-1.9.0/naked-objects/dom/src/main/java/domainapp/dom/app/homepagePNG  IHDR szzIDATXGQ0D_*JH@BYF($m+c+kʚc6B>L#w >@_Pi\$ n1z)M񷠾q*@J\XC  ĵ5RN|]] ZT5lA]+p @thU{A@mq7wA@ablnz]ʵ\ -`*+(Z]OxM΁7,uAyJ <18l+LI۠Jh;=%-؁ ƁP%tX$uԸżv~Ӿ0Xl%DuCN(jHX*Trٰ;_A(IENDB`java-design-patterns-1.9.0/naked-objects/dom/src/main/java/domainapp/dom/modules/000077500000000000000000000000001264154357600277075ustar00rootroot00000000000000java-design-patterns-1.9.0/naked-objects/dom/src/main/java/domainapp/dom/modules/simple/000077500000000000000000000000001264154357600312005ustar00rootroot00000000000000SimpleObject.java000066400000000000000000000104421264154357600343450ustar00rootroot00000000000000java-design-patterns-1.9.0/naked-objects/dom/src/main/java/domainapp/dom/modules/simple/* * Licensed to the Apache Software Foundation (ASF) under one or more contributor license * agreements. See the NOTICE file distributed with this work for additional information regarding * copyright ownership. The ASF licenses this file to you under the Apache License, Version 2.0 (the * "License"); you may not use this file except in compliance with the License. You may obtain a * copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software distributed under the License * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express * or implied. See the License for the specific language governing permissions and limitations under * the License. */ package domainapp.dom.modules.simple; import javax.jdo.JDOHelper; import javax.jdo.annotations.IdentityType; import javax.jdo.annotations.VersionStrategy; import org.apache.isis.applib.DomainObjectContainer; import org.apache.isis.applib.Identifier; import org.apache.isis.applib.annotation.Action; import org.apache.isis.applib.annotation.BookmarkPolicy; import org.apache.isis.applib.annotation.DomainObject; import org.apache.isis.applib.annotation.DomainObjectLayout; import org.apache.isis.applib.annotation.Editing; import org.apache.isis.applib.annotation.Parameter; import org.apache.isis.applib.annotation.ParameterLayout; import org.apache.isis.applib.annotation.Property; import org.apache.isis.applib.annotation.Title; import org.apache.isis.applib.services.eventbus.ActionDomainEvent; import org.apache.isis.applib.services.i18n.TranslatableString; import org.apache.isis.applib.util.ObjectContracts; @javax.jdo.annotations.PersistenceCapable(identityType = IdentityType.DATASTORE, schema = "simple", table = "SimpleObject") @javax.jdo.annotations.DatastoreIdentity( strategy = javax.jdo.annotations.IdGeneratorStrategy.IDENTITY, column = "id") @javax.jdo.annotations.Version(strategy = VersionStrategy.VERSION_NUMBER, column = "version") @javax.jdo.annotations.Queries({ @javax.jdo.annotations.Query(name = "find", language = "JDOQL", value = "SELECT " + "FROM domainapp.dom.modules.simple.SimpleObject "), @javax.jdo.annotations.Query(name = "findByName", language = "JDOQL", value = "SELECT " + "FROM domainapp.dom.modules.simple.SimpleObject " + "WHERE name.indexOf(:name) >= 0 ")}) @javax.jdo.annotations.Unique(name = "SimpleObject_name_UNQ", members = {"name"}) @DomainObject @DomainObjectLayout(bookmarking = BookmarkPolicy.AS_ROOT, cssClassFa = "fa-flag") public class SimpleObject implements Comparable { // region > identificatiom public TranslatableString title() { return TranslatableString.tr("Object: {name}", "name", getName()); } // endregion // region > name (property) private String name; @javax.jdo.annotations.Column(allowsNull = "false", length = 40) @Title(sequence = "1") @Property(editing = Editing.DISABLED) public String getName() { return name; } public void setName(final String name) { this.name = name; } // endregion // region > updateName (action) public static class UpdateNameDomainEvent extends ActionDomainEvent { public UpdateNameDomainEvent(final SimpleObject source, final Identifier identifier, final Object... arguments) { super(source, identifier, arguments); } } @Action(domainEvent = UpdateNameDomainEvent.class) public SimpleObject updateName( @Parameter(maxLength = 40) @ParameterLayout(named = "New name") final String name) { setName(name); return this; } public String default0UpdateName() { return getName(); } public TranslatableString validateUpdateName(final String name) { return name.contains("!") ? TranslatableString.tr("Exclamation mark is not allowed") : null; } // endregion // region > version (derived property) public Long getVersionSequence() { return (Long) JDOHelper.getVersion(this); } // endregion // region > compareTo @Override public int compareTo(final SimpleObject other) { return ObjectContracts.compare(this, other, "name"); } // endregion // region > injected services @javax.inject.Inject @SuppressWarnings("unused") private DomainObjectContainer container; // endregion } SimpleObject.layout.json000066400000000000000000000034561264154357600357200ustar00rootroot00000000000000java-design-patterns-1.9.0/naked-objects/dom/src/main/java/domainapp/dom/modules/simple/** * Licensed to the Apache Software Foundation (ASF) under one or more * contributor license agreements. See the NOTICE file distributed with * this work for additional information regarding copyright ownership. * The ASF licenses this file to You under the Apache License, Version 2.0 * (the "License"); you may not use this file except in compliance with * the License. You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ { "columns": [ { "span": 6, "memberGroups": { "General": { "members": { "name": { "actions": { "updateName": { "actionLayout": { "position": "BOTTOM" } } } }, "versionSequence": { "propertyLayout": { "name": "version" } } } } } }, { "span": 0, "memberGroups": {} }, { "span": 0, "memberGroups": {} }, { "span": 6, "collections": {} } ], "actions": {} }SimpleObject.png000066400000000000000000000012151264154357600342060ustar00rootroot00000000000000java-design-patterns-1.9.0/naked-objects/dom/src/main/java/domainapp/dom/modules/simplePNG  IHDR szzTIDATXGŗ1A"@\ D"@ D[ٙٝR~g?37H-]g uS C53$-JGo!,OE4!?QGZ/)𫈄Th%FxJ C ̋HH>D+"ܻ H-z¥zH> rFcћW![>C^L7LDJ|{.s 9"!ɹ1_Ŕ$BR͔))hi RHdN %Ae۴A:wm\B""bR1,")Js!!u;)RC@Gu$,x}LS*LlvT(fkϖ&cǗ>ȍ0;|b)@0uRDWf{, .<64Nu?#8 逾"]G)Nytm)#b&`c!@ڮ *Ba>y߈ "ǃr)9&GExD-LC2c7_5Sw-3|IwpX6~QlbYIENDB`SimpleObjects.java000066400000000000000000000062701264154357600345340ustar00rootroot00000000000000java-design-patterns-1.9.0/naked-objects/dom/src/main/java/domainapp/dom/modules/simple/* * Licensed to the Apache Software Foundation (ASF) under one or more contributor license * agreements. See the NOTICE file distributed with this work for additional information regarding * copyright ownership. The ASF licenses this file to you under the Apache License, Version 2.0 (the * "License"); you may not use this file except in compliance with the License. You may obtain a * copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software distributed under the License * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express * or implied. See the License for the specific language governing permissions and limitations under * the License. */ package domainapp.dom.modules.simple; import java.util.List; import org.apache.isis.applib.DomainObjectContainer; import org.apache.isis.applib.Identifier; import org.apache.isis.applib.annotation.Action; import org.apache.isis.applib.annotation.ActionLayout; import org.apache.isis.applib.annotation.BookmarkPolicy; import org.apache.isis.applib.annotation.DomainService; import org.apache.isis.applib.annotation.DomainServiceLayout; import org.apache.isis.applib.annotation.MemberOrder; import org.apache.isis.applib.annotation.ParameterLayout; import org.apache.isis.applib.annotation.SemanticsOf; import org.apache.isis.applib.query.QueryDefault; import org.apache.isis.applib.services.eventbus.ActionDomainEvent; import org.apache.isis.applib.services.i18n.TranslatableString; @DomainService(repositoryFor = SimpleObject.class) @DomainServiceLayout(menuOrder = "10") public class SimpleObjects { // region > title public TranslatableString title() { return TranslatableString.tr("Simple Objects"); } // endregion // region > listAll (action) @Action(semantics = SemanticsOf.SAFE) @ActionLayout(bookmarking = BookmarkPolicy.AS_ROOT) @MemberOrder(sequence = "1") public List listAll() { return container.allInstances(SimpleObject.class); } // endregion // region > findByName (action) @Action(semantics = SemanticsOf.SAFE) @ActionLayout(bookmarking = BookmarkPolicy.AS_ROOT) @MemberOrder(sequence = "2") public List findByName(@ParameterLayout(named = "Name") final String name) { return container.allMatches(new QueryDefault<>(SimpleObject.class, "findByName", "name", name)); } // endregion // region > create (action) public static class CreateDomainEvent extends ActionDomainEvent { public CreateDomainEvent(final SimpleObjects source, final Identifier identifier, final Object... arguments) { super(source, identifier, arguments); } } /** * Create simple object */ @Action(domainEvent = CreateDomainEvent.class) @MemberOrder(sequence = "3") public SimpleObject create(@ParameterLayout(named = "Name") final String name) { final SimpleObject obj = container.newTransientInstance(SimpleObject.class); obj.setName(name); container.persistIfNotAlready(obj); return obj; } // endregion // region > injected services @javax.inject.Inject DomainObjectContainer container; // endregion } java-design-patterns-1.9.0/naked-objects/dom/src/test/000077500000000000000000000000001264154357600226225ustar00rootroot00000000000000java-design-patterns-1.9.0/naked-objects/dom/src/test/java/000077500000000000000000000000001264154357600235435ustar00rootroot00000000000000java-design-patterns-1.9.0/naked-objects/dom/src/test/java/domainapp/000077500000000000000000000000001264154357600255135ustar00rootroot00000000000000java-design-patterns-1.9.0/naked-objects/dom/src/test/java/domainapp/dom/000077500000000000000000000000001264154357600262725ustar00rootroot00000000000000java-design-patterns-1.9.0/naked-objects/dom/src/test/java/domainapp/dom/modules/000077500000000000000000000000001264154357600277425ustar00rootroot00000000000000java-design-patterns-1.9.0/naked-objects/dom/src/test/java/domainapp/dom/modules/simple/000077500000000000000000000000001264154357600312335ustar00rootroot00000000000000SimpleObjectTest.java000066400000000000000000000026371264154357600352470ustar00rootroot00000000000000java-design-patterns-1.9.0/naked-objects/dom/src/test/java/domainapp/dom/modules/simple/** * Licensed to the Apache Software Foundation (ASF) under one or more contributor license * agreements. See the NOTICE file distributed with this work for additional information regarding * copyright ownership. The ASF licenses this file to You under the Apache License, Version 2.0 (the * "License"); you may not use this file except in compliance with the License. You may obtain a * copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software distributed under the License * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express * or implied. See the License for the specific language governing permissions and limitations under * the License. */ package domainapp.dom.modules.simple; import org.junit.Before; import org.junit.Test; import static org.assertj.core.api.Assertions.assertThat; public class SimpleObjectTest { SimpleObject simpleObject; @Before public void setUp() throws Exception { simpleObject = new SimpleObject(); } public static class Name extends SimpleObjectTest { @Test public void happyCase() throws Exception { // given String name = "Foobar"; assertThat(simpleObject.getName()).isNull(); // when simpleObject.setName(name); // then assertThat(simpleObject.getName()).isEqualTo(name); } } } SimpleObjectsTest.java000066400000000000000000000056031264154357600354260ustar00rootroot00000000000000java-design-patterns-1.9.0/naked-objects/dom/src/test/java/domainapp/dom/modules/simple/** * Licensed to the Apache Software Foundation (ASF) under one or more contributor license * agreements. See the NOTICE file distributed with this work for additional information regarding * copyright ownership. The ASF licenses this file to You under the Apache License, Version 2.0 (the * "License"); you may not use this file except in compliance with the License. You may obtain a * copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software distributed under the License * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express * or implied. See the License for the specific language governing permissions and limitations under * the License. */ package domainapp.dom.modules.simple; import java.util.List; import com.google.common.collect.Lists; import org.jmock.Expectations; import org.jmock.Sequence; import org.jmock.auto.Mock; import org.junit.Before; import org.junit.Rule; import org.junit.Test; import org.apache.isis.applib.DomainObjectContainer; import org.apache.isis.core.unittestsupport.jmocking.JUnitRuleMockery2; import org.apache.isis.core.unittestsupport.jmocking.JUnitRuleMockery2.Mode; import static org.assertj.core.api.Assertions.assertThat; public class SimpleObjectsTest { @Rule public JUnitRuleMockery2 context = JUnitRuleMockery2.createFor(Mode.INTERFACES_AND_CLASSES); @Mock DomainObjectContainer mockContainer; SimpleObjects simpleObjects; @Before public void setUp() throws Exception { simpleObjects = new SimpleObjects(); simpleObjects.container = mockContainer; } public static class Create extends SimpleObjectsTest { @Test public void happyCase() throws Exception { // given final SimpleObject simpleObject = new SimpleObject(); final Sequence seq = context.sequence("create"); context.checking(new Expectations() { { oneOf(mockContainer).newTransientInstance(SimpleObject.class); inSequence(seq); will(returnValue(simpleObject)); oneOf(mockContainer).persistIfNotAlready(simpleObject); inSequence(seq); } }); // when final SimpleObject obj = simpleObjects.create("Foobar"); // then assertThat(obj).isEqualTo(simpleObject); assertThat(obj.getName()).isEqualTo("Foobar"); } } public static class ListAll extends SimpleObjectsTest { @Test public void happyCase() throws Exception { // given final List all = Lists.newArrayList(); context.checking(new Expectations() { { oneOf(mockContainer).allInstances(SimpleObject.class); will(returnValue(all)); } }); // when final List list = simpleObjects.listAll(); // then assertThat(list).isEqualTo(all); } } } java-design-patterns-1.9.0/naked-objects/etc/000077500000000000000000000000001264154357600210505ustar00rootroot00000000000000java-design-patterns-1.9.0/naked-objects/etc/naked-objects.png000066400000000000000000002224161264154357600242760ustar00rootroot00000000000000PNG  IHDRV$IDATxm-Gy4Q>"Hü &\ g8bresIb6F-2 8 lea|6>Nll@>+q8c0/K',>9D14o]/OUW^ݫ_[kuWUWwuۗ_z]o&>O/UUl'V{y>Nrv $/{g[3{GOܚ=:Lͧ O-~-cJ9@l@I{~#{}{L~#(Fu\X.i`,d6MZۮ~J偙O y(} 䨺S-\=3G|#D 3!8a"؀k:K/E_GnHKQ/Qָ%Px XK ٽ|aogWe&ǺU_׶ طS*Is"NS_K{>^|m[3arpw.>}E'ߩ_eL-iͬVD_R[zknBg .țҵDX`GUZ)"SNH 6 $/_[ޕ<?_rUueG^x듿qb9 > ETy6Un飀UVO@1E򣀎B% H_:37k'Mou?5q=cZÞpᅿdy[GRƮ % [p11`\ `["pZW8}h PA H$aD&qZg&X B)HZ~@8.ǪTyMػMHHM$c#H*  BHg߾7?$cy0`Bp" B)J!{Y+>+#qGc  $aD*:vH;˴,=ב{=VV%T%` DP] 8z bu̍H;֑TJS\iSb#uM N T2).?VBp؆HC) @@T@*`#6#V<[HUX=_79iHqBrZvyD1_BV`XeÈ0qT k\,PjMɱժﭞq~"=CIߗAhAQ9rb DhIvH*.z̤-Նh+JZtI>nOL1`59^KX :BwHM8ݩ%ʕ :Qc tɑ#|Oq[#@0q!1 $3^Ǖ<VW׎nyു]UBb`bDBڢjyBiQs!@Gbu46G$ͤWTU:3Mu1RkMҔPMF5K@$fDP0wxa c `] %+R+{\(#)>2gB$͈1O `gwNLtcej99 3=u`yቑ+j[9y Dh o& $ٳG/tp{jNU/q/k  V܈0[NvbV+ms\;" wNC 5T ̟mJf:K#"[ @q/وˠY `58H@8"vCPqp M򕨚d.&VlWu/~E:p BHF$m' n.isc{R[%6 H=I @>'euO*3pD& @$HHM$c#H*  BHF$T @#%6 H0"@FJ$m"T|sM|69NBF @$BY\pk0w$mݶܱ;4 $|RM~>v?̙_t$\?*m|=+O77qo#-MLQ= rZ?*g{ /a~g0nҤ?~ph c)lHGYe~۾3n|^edxlzPzJ'l]wD1 @0RF%7i&# `Dxso̕8{y?zE.WgR'GgV> _p(h(؊.qk"@Fx$M-KJ*EMbDxC7^\=>=O}~|xw&~[Kv2z?V_YiRLBjapOB)?զ/őZ3boryL#$5A+%5{RYN! !]i?)cs1a M.CQGʒ?zK;:)cDpgϝ7oHd?ǧ*ar!;I0V=l W1Ȫ>6Dk:K/E{ǿ;9?7~sA.ME{-ڪʛ,\^e&7ˉaoWx=eo3=ݵm.%P2*J]5f۶JmB%mECI+nƐz5zϧ 1ʃׯBan3h N&XIjz8m!q46B~O%o~7[o7&|ǛW\tz}%2uРQg!c>:zʅ˫v/9VWkfe̱ŞvbrV i=&I% `B7;pg8v2iDcܮ&Mۄ0Sz~ƴrb_/F /_[ޕdϗ}w]>Y}] /~hU%kL?d%3f*utdfRpQ쐶R(vFIJUBgeۼ5>Zg Vk/f>bwO\fxV8/Q$uNgFLS$U"D? 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See the NOTICE file distributed with this work for additional information regarding * copyright ownership. The ASF licenses this file to you under the Apache License, Version 2.0 (the * "License"); you may not use this file except in compliance with the License. You may obtain a * copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software distributed under the License * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express * or implied. See the License for the specific language governing permissions and limitations under * the License. */ package domainapp.fixture; import org.apache.isis.applib.annotation.DomainService; import org.apache.isis.applib.annotation.NatureOfService; import org.apache.isis.applib.fixturescripts.FixtureScripts; import org.apache.isis.applib.services.fixturespec.FixtureScriptsSpecification; import org.apache.isis.applib.services.fixturespec.FixtureScriptsSpecificationProvider; import domainapp.fixture.scenarios.RecreateSimpleObjects; /** * Specifies where to find fixtures, and other settings. */ @DomainService(nature = NatureOfService.DOMAIN) public class DomainAppFixturesProvider implements FixtureScriptsSpecificationProvider { @Override public FixtureScriptsSpecification getSpecification() { return FixtureScriptsSpecification.builder(DomainAppFixturesProvider.class) .with(FixtureScripts.MultipleExecutionStrategy.EXECUTE) .withRunScriptDefault(RecreateSimpleObjects.class) .withRunScriptDropDown(FixtureScriptsSpecification.DropDownPolicy.CHOICES) .withRecreate(RecreateSimpleObjects.class).build(); } } java-design-patterns-1.9.0/naked-objects/fixture/src/main/java/domainapp/fixture/modules/000077500000000000000000000000001264154357600315255ustar00rootroot00000000000000java-design-patterns-1.9.0/naked-objects/fixture/src/main/java/domainapp/fixture/modules/simple/000077500000000000000000000000001264154357600330165ustar00rootroot00000000000000SimpleObjectCreate.java000066400000000000000000000035171264154357600373140ustar00rootroot00000000000000java-design-patterns-1.9.0/naked-objects/fixture/src/main/java/domainapp/fixture/modules/simple/* * Licensed to the Apache Software Foundation (ASF) under one or more contributor license * agreements. See the NOTICE file distributed with this work for additional information regarding * copyright ownership. The ASF licenses this file to you under the Apache License, Version 2.0 (the * "License"); you may not use this file except in compliance with the License. You may obtain a * copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software distributed under the License * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express * or implied. See the License for the specific language governing permissions and limitations under * the License. */ package domainapp.fixture.modules.simple; import org.apache.isis.applib.fixturescripts.FixtureScript; import domainapp.dom.modules.simple.SimpleObject; import domainapp.dom.modules.simple.SimpleObjects; public class SimpleObjectCreate extends FixtureScript { // region > name (input) private String name; /** * Name of the object (required) */ public String getName() { return name; } public SimpleObjectCreate setName(final String name) { this.name = name; return this; } // endregion // region > simpleObject (output) private SimpleObject simpleObject; /** * The created simple object (output). */ public SimpleObject getSimpleObject() { return simpleObject; } // endregion @Override protected void execute(final ExecutionContext ec) { String paramName = checkParam("name", ec, String.class); this.simpleObject = wrap(simpleObjects).create(paramName); // also make available to UI ec.addResult(this, simpleObject); } @javax.inject.Inject private SimpleObjects simpleObjects; } SimpleObjectsTearDown.java000066400000000000000000000023371264154357600400160ustar00rootroot00000000000000java-design-patterns-1.9.0/naked-objects/fixture/src/main/java/domainapp/fixture/modules/simple/* * Licensed to the Apache Software Foundation (ASF) under one or more contributor license * agreements. See the NOTICE file distributed with this work for additional information regarding * copyright ownership. The ASF licenses this file to you under the Apache License, Version 2.0 (the * "License"); you may not use this file except in compliance with the License. You may obtain a * copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software distributed under the License * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express * or implied. See the License for the specific language governing permissions and limitations under * the License. */ package domainapp.fixture.modules.simple; import org.apache.isis.applib.fixturescripts.FixtureScript; import org.apache.isis.applib.services.jdosupport.IsisJdoSupport; public class SimpleObjectsTearDown extends FixtureScript { @Override protected void execute(ExecutionContext executionContext) { isisJdoSupport.executeUpdate("delete from \"simple\".\"SimpleObject\""); } @javax.inject.Inject private IsisJdoSupport isisJdoSupport; } java-design-patterns-1.9.0/naked-objects/fixture/src/main/java/domainapp/fixture/scenarios/000077500000000000000000000000001264154357600320435ustar00rootroot00000000000000RecreateSimpleObjects.java000066400000000000000000000053251264154357600370520ustar00rootroot00000000000000java-design-patterns-1.9.0/naked-objects/fixture/src/main/java/domainapp/fixture/scenarios/* * Licensed to the Apache Software Foundation (ASF) under one or more contributor license * agreements. See the NOTICE file distributed with this work for additional information regarding * copyright ownership. The ASF licenses this file to you under the Apache License, Version 2.0 (the * "License"); you may not use this file except in compliance with the License. You may obtain a * copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software distributed under the License * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express * or implied. See the License for the specific language governing permissions and limitations under * the License. */ package domainapp.fixture.scenarios; import java.util.Arrays; import java.util.Collections; import java.util.List; import com.google.common.collect.Lists; import org.apache.isis.applib.fixturescripts.FixtureScript; import domainapp.dom.modules.simple.SimpleObject; import domainapp.fixture.modules.simple.SimpleObjectCreate; import domainapp.fixture.modules.simple.SimpleObjectsTearDown; public class RecreateSimpleObjects extends FixtureScript { public final List names = Collections.unmodifiableList(Arrays.asList("Foo", "Bar", "Baz", "Frodo", "Froyo", "Fizz", "Bip", "Bop", "Bang", "Boo")); public RecreateSimpleObjects() { withDiscoverability(Discoverability.DISCOVERABLE); } // region > number (optional input) private Integer number; /** * The number of objects to create, up to 10; optional, defaults to 3. */ public Integer getNumber() { return number; } public RecreateSimpleObjects setNumber(final Integer number) { this.number = number; return this; } // endregion // region > simpleObjects (output) private final List simpleObjects = Lists.newArrayList(); /** * The simpleobjects created by this fixture (output). */ public List getSimpleObjects() { return simpleObjects; } // endregion @Override protected void execute(final ExecutionContext ec) { // defaults final int paramNumber = defaultParam("number", ec, 3); // validate if (paramNumber < 0 || paramNumber > names.size()) { throw new IllegalArgumentException(String.format("number must be in range [0,%d)", names.size())); } // // execute // ec.executeChild(this, new SimpleObjectsTearDown()); for (int i = 0; i < paramNumber; i++) { final SimpleObjectCreate fs = new SimpleObjectCreate().setName(names.get(i)); ec.executeChild(this, fs.getName(), fs); simpleObjects.add(fs.getSimpleObject()); } } } java-design-patterns-1.9.0/naked-objects/index.md000066400000000000000000000014761264154357600217360ustar00rootroot00000000000000--- layout: pattern title: Naked Objects folder: naked-objects permalink: /patterns/naked-objects/ categories: Architectural tags: - Java - Difficulty-Expert --- **Intent:** The Naked Objects architectural pattern is well suited for rapid prototyping. Using the pattern, you only need to write the domain objects, everything else is autogenerated by the framework. ![alt text](./etc/naked-objects.png "Naked Objects") **Applicability:** Use the Naked Objects pattern when * you are prototyping and need fast development cycle * an autogenerated user interface is good enough * you want to automatically publish the domain as REST services **Real world examples:** * [Apache Isis](https://isis.apache.org/) **Credits:** * [Richard Pawson - Naked Objects](http://downloads.nakedobjects.net/resources/Pawson%20thesis.pdf) java-design-patterns-1.9.0/naked-objects/integtests/000077500000000000000000000000001264154357600224665ustar00rootroot00000000000000java-design-patterns-1.9.0/naked-objects/integtests/.gitignore000066400000000000000000000000221264154357600244500ustar00rootroot00000000000000/translations.pot java-design-patterns-1.9.0/naked-objects/integtests/logging.properties000066400000000000000000000112061264154357600262320ustar00rootroot00000000000000# Licensed to the Apache Software Foundation (ASF) under one # or more contributor license agreements. See the NOTICE file # distributed with this work for additional information # regarding copyright ownership. The ASF licenses this file # to you under the Apache License, Version 2.0 (the # "License"); you may not use this file except in compliance # with the License. You may obtain a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, # software distributed under the License is distributed on an # "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY # KIND, either express or implied. See the License for the # specific language governing permissions and limitations # under the License. # # Isis uses log4j is used to provide system logging # log4j.rootCategory=INFO, Console # The console appender log4j.appender.Console=org.apache.log4j.ConsoleAppender log4j.appender.Console.target=System.out log4j.appender.Console.layout=org.apache.log4j.PatternLayout log4j.appender.Console.layout.ConversionPattern=%d{ABSOLUTE} [%-20c{1} %-10t %-5p] %m%n log4j.appender.File=org.apache.log4j.RollingFileAppender log4j.appender.File.file=isis.log log4j.appender.File.append=false log4j.appender.File.layout=org.apache.log4j.PatternLayout log4j.appender.File.layout.ConversionPattern=%d [%-20c{1} %-10t %-5p] %m%n log4j.appender.translations-po=org.apache.log4j.FileAppender log4j.appender.translations-po.File=./translations.pot log4j.appender.translations-po.Append=false log4j.appender.translations-po.layout=org.apache.log4j.PatternLayout log4j.appender.translations-po.layout.ConversionPattern=%m%n ! turn on the internal log4j debugging flag so we can see what it is doing #log4j.debug=true # DataNucleus # the first two log the DML and DDL (if set to DEBUG) log4j.logger.DataNucleus.Datastore.Native=WARN, Console log4j.logger.DataNucleus.Datastore.Schema=DEBUG, Console # the remainder can probably be left to WARN log4j.logger.DataNucleus.Persistence=WARN, Console log4j.logger.DataNucleus.Transaction=WARN, Console log4j.logger.DataNucleus.Connection=WARN, Console log4j.logger.DataNucleus.Query=WARN, Console log4j.logger.DataNucleus.Cache=WARN, Console log4j.logger.DataNucleus.MetaData=WARN, Console log4j.logger.DataNucleus.Datastore=WARN, Console log4j.logger.DataNucleus.Datastore.Persist=WARN, Console log4j.logger.DataNucleus.Datastore.Retrieve=WARN, Console log4j.logger.DataNucleus.General=WARN, Console log4j.logger.DataNucleus.Lifecycle=WARN, Console log4j.logger.DataNucleus.ValueGeneration=WARN, Console log4j.logger.DataNucleus.Enhancer=WARN, Console log4j.logger.DataNucleus.SchemaTool=ERROR, Console log4j.logger.DataNucleus.JDO=WARN, Console log4j.logger.DataNucleus.JPA=ERROR, Console log4j.logger.DataNucleus.JCA=WARN, Console log4j.logger.DataNucleus.IDE=ERROR, Console log4j.additivity.DataNucleus.Datastore.Native=false log4j.additivity.DataNucleus.Datastore.Schema=false log4j.additivity.DataNucleus.Datastore.Persistence=false log4j.additivity.DataNucleus.Datastore.Transaction=false log4j.additivity.DataNucleus.Datastore.Connection=false log4j.additivity.DataNucleus.Datastore.Query=false log4j.additivity.DataNucleus.Datastore.Cache=false log4j.additivity.DataNucleus.Datastore.MetaData=false log4j.additivity.DataNucleus.Datastore.Datastore=false log4j.additivity.DataNucleus.Datastore.Datastore.Persist=false log4j.additivity.DataNucleus.Datastore.Datastore.Retrieve=false log4j.additivity.DataNucleus.Datastore.General=false log4j.additivity.DataNucleus.Datastore.Lifecycle=false log4j.additivity.DataNucleus.Datastore.ValueGeneration=false log4j.additivity.DataNucleus.Datastore.Enhancer=false log4j.additivity.DataNucleus.Datastore.SchemaTool=false log4j.additivity.DataNucleus.Datastore.JDO=false log4j.additivity.DataNucleus.Datastore.JPA=false log4j.additivity.DataNucleus.Datastore.JCA=false log4j.additivity.DataNucleus.Datastore.IDE=false # if using log4jdbc-remix as JDBC driver #log4j.logger.jdbc.sqlonly=DEBUG, sql, Console #log4j.additivity.jdbc.sqlonly=false #log4j.logger.jdbc.resultsettable=DEBUG, jdbc, Console #log4j.additivity.jdbc.resultsettable=false #log4j.logger.jdbc.audit=WARN,jdbc, Console #log4j.additivity.jdbc.audit=false #log4j.logger.jdbc.resultset=WARN,jdbc #log4j.additivity.jdbc.resultset=false #log4j.logger.jdbc.sqltiming=WARN,sqltiming #log4j.additivity.jdbc.sqltiming=false #log4j.logger.jdbc.connection=FATAL,connection #log4j.additivity.jdbc.connection=false log4j.logger.org.apache.isis.core.runtime.services.i18n.po.PoWriter=INFO,translations-po log4j.additivity.org.apache.isis.core.runtime.services.i18n.po.PotWriter=false java-design-patterns-1.9.0/naked-objects/integtests/pom.xml000066400000000000000000000073011264154357600240040ustar00rootroot00000000000000 4.0.0 com.iluwatar naked-objects 1.9.0 naked-objects-integtests src/test/resources src/test/java ** **/*.java ${project.groupId} naked-objects-fixture org.apache.isis.core isis-core-unittestsupport org.apache.isis.core isis-core-integtestsupport org.apache.isis.core isis-core-specsupport org.hamcrest hamcrest-library org.apache.isis.core isis-core-wrapper org.apache.isis.core isis-core-runtime org.assertj assertj-core test org.hsqldb hsqldb java-design-patterns-1.9.0/naked-objects/integtests/src/000077500000000000000000000000001264154357600232555ustar00rootroot00000000000000java-design-patterns-1.9.0/naked-objects/integtests/src/test/000077500000000000000000000000001264154357600242345ustar00rootroot00000000000000java-design-patterns-1.9.0/naked-objects/integtests/src/test/java/000077500000000000000000000000001264154357600251555ustar00rootroot00000000000000java-design-patterns-1.9.0/naked-objects/integtests/src/test/java/domainapp/000077500000000000000000000000001264154357600271255ustar00rootroot00000000000000java-design-patterns-1.9.0/naked-objects/integtests/src/test/java/domainapp/integtests/000077500000000000000000000000001264154357600313165ustar00rootroot00000000000000java-design-patterns-1.9.0/naked-objects/integtests/src/test/java/domainapp/integtests/bootstrap/000077500000000000000000000000001264154357600333335ustar00rootroot00000000000000SimpleAppSystemInitializer.java000066400000000000000000000041501264154357600414220ustar00rootroot00000000000000java-design-patterns-1.9.0/naked-objects/integtests/src/test/java/domainapp/integtests/bootstrap/* * Licensed to the Apache Software Foundation (ASF) under one or more contributor license * agreements. See the NOTICE file distributed with this work for additional information regarding * copyright ownership. The ASF licenses this file to you under the Apache License, Version 2.0 (the * "License"); you may not use this file except in compliance with the License. You may obtain a * copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software distributed under the License * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express * or implied. See the License for the specific language governing permissions and limitations under * the License. */ package domainapp.integtests.bootstrap; import org.apache.isis.core.commons.config.IsisConfiguration; import org.apache.isis.core.integtestsupport.IsisSystemForTest; import org.apache.isis.objectstore.jdo.datanucleus.DataNucleusPersistenceMechanismInstaller; import org.apache.isis.objectstore.jdo.datanucleus.IsisConfigurationForJdoIntegTests; public class SimpleAppSystemInitializer { private SimpleAppSystemInitializer() { } /** * Init test system */ public static void initIsft() { IsisSystemForTest isft = IsisSystemForTest.getElseNull(); if (isft == null) { isft = new SimpleAppSystemBuilder().build().setUpSystem(); IsisSystemForTest.set(isft); } } private static class SimpleAppSystemBuilder extends IsisSystemForTest.Builder { public SimpleAppSystemBuilder() { withLoggingAt(org.apache.log4j.Level.INFO); with(testConfiguration()); with(new DataNucleusPersistenceMechanismInstaller()); // services annotated with @DomainService withServicesIn("domainapp"); } private static IsisConfiguration testConfiguration() { final IsisConfigurationForJdoIntegTests testConfiguration = new IsisConfigurationForJdoIntegTests(); testConfiguration.addRegisterEntitiesPackagePrefix("domainapp.dom.modules"); return testConfiguration; } } } java-design-patterns-1.9.0/naked-objects/integtests/src/test/java/domainapp/integtests/specglue/000077500000000000000000000000001264154357600331255ustar00rootroot00000000000000BootstrappingGlue.java000066400000000000000000000030151264154357600373600ustar00rootroot00000000000000java-design-patterns-1.9.0/naked-objects/integtests/src/test/java/domainapp/integtests/specglue/** * O * Licensed to the Apache Software Foundation (ASF) under one or more contributor license * agreements. See the NOTICE file distributed with this work for additional information regarding * copyright ownership. The ASF licenses this file to You under the Apache License, Version 2.0 (the * "License"); you may not use this file except in compliance with the License. You may obtain a * copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software distributed under the License * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express * or implied. See the License for the specific language governing permissions and limitations under * the License. */ package domainapp.integtests.specglue; import org.apache.isis.core.specsupport.scenarios.ScenarioExecutionScope; import org.apache.isis.core.specsupport.specs.CukeGlueAbstract; import cucumber.api.java.After; import cucumber.api.java.Before; import domainapp.integtests.bootstrap.SimpleAppSystemInitializer; public class BootstrappingGlue extends CukeGlueAbstract { @Before(value = {"@integration"}, order = 100) public void beforeScenarioIntegrationScope() { org.apache.log4j.PropertyConfigurator.configure("logging.properties"); SimpleAppSystemInitializer.initIsft(); before(ScenarioExecutionScope.INTEGRATION); } @After public void afterScenario(cucumber.api.Scenario sc) { assertMocksSatisfied(); after(sc); } } CatalogOfFixturesGlue.java000066400000000000000000000023421264154357600401200ustar00rootroot00000000000000java-design-patterns-1.9.0/naked-objects/integtests/src/test/java/domainapp/integtests/specglue/** * Licensed to the Apache Software Foundation (ASF) under one or more contributor license * agreements. See the NOTICE file distributed with this work for additional information regarding * copyright ownership. The ASF licenses this file to You under the Apache License, Version 2.0 (the * "License"); you may not use this file except in compliance with the License. You may obtain a * copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software distributed under the License * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express * or implied. See the License for the specific language governing permissions and limitations under * the License. */ package domainapp.integtests.specglue; import org.apache.isis.core.specsupport.specs.CukeGlueAbstract; import cucumber.api.java.Before; import domainapp.fixture.scenarios.RecreateSimpleObjects; public class CatalogOfFixturesGlue extends CukeGlueAbstract { @Before(value = {"@integration", "@SimpleObjectsFixture"}, order = 20000) public void integrationFixtures() throws Throwable { scenarioExecution().install(new RecreateSimpleObjects()); } } modules/000077500000000000000000000000001264154357600345165ustar00rootroot00000000000000java-design-patterns-1.9.0/naked-objects/integtests/src/test/java/domainapp/integtests/specgluesimple/000077500000000000000000000000001264154357600360075ustar00rootroot00000000000000java-design-patterns-1.9.0/naked-objects/integtests/src/test/java/domainapp/integtests/specglue/modulesSimpleObjectGlue.java000066400000000000000000000034001264154357600420440ustar00rootroot00000000000000java-design-patterns-1.9.0/naked-objects/integtests/src/test/java/domainapp/integtests/specglue/modules/simple/** * Licensed to the Apache Software Foundation (ASF) under one or more contributor license * agreements. See the NOTICE file distributed with this work for additional information regarding * copyright ownership. The ASF licenses this file to You under the Apache License, Version 2.0 (the * "License"); you may not use this file except in compliance with the License. You may obtain a * copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software distributed under the License * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express * or implied. See the License for the specific language governing permissions and limitations under * the License. */ package domainapp.integtests.specglue.modules.simple; import java.util.List; import java.util.UUID; import org.apache.isis.core.specsupport.specs.CukeGlueAbstract; import cucumber.api.java.en.Given; import cucumber.api.java.en.When; import domainapp.dom.modules.simple.SimpleObject; import domainapp.dom.modules.simple.SimpleObjects; import static org.hamcrest.CoreMatchers.is; import static org.junit.Assert.assertThat; public class SimpleObjectGlue extends CukeGlueAbstract { @Given("^there are.* (\\d+) simple objects$") public void thereAreNumSimpleObjects(int n) throws Throwable { try { final List findAll = service(SimpleObjects.class).listAll(); assertThat(findAll.size(), is(n)); putVar("list", "all", findAll); } finally { assertMocksSatisfied(); } } @When("^I create a new simple object$") public void createNewSimpleObject() throws Throwable { service(SimpleObjects.class).create(UUID.randomUUID().toString()); } } java-design-patterns-1.9.0/naked-objects/integtests/src/test/java/domainapp/integtests/specs/000077500000000000000000000000001264154357600324335ustar00rootroot00000000000000RunSpecs.java000066400000000000000000000024401264154357600347610ustar00rootroot00000000000000java-design-patterns-1.9.0/naked-objects/integtests/src/test/java/domainapp/integtests/specs/** * Licensed to the Apache Software Foundation (ASF) under one or more contributor license * agreements. See the NOTICE file distributed with this work for additional information regarding * copyright ownership. The ASF licenses this file to You under the Apache License, Version 2.0 (the * "License"); you may not use this file except in compliance with the License. You may obtain a * copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software distributed under the License * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express * or implied. See the License for the specific language governing permissions and limitations under * the License. */ package domainapp.integtests.specs; import org.junit.runner.RunWith; import cucumber.api.CucumberOptions; import cucumber.api.junit.Cucumber; /** * Runs scenarios in all .feature files (this package and any subpackages). */ @RunWith(Cucumber.class) @CucumberOptions(format = {"html:target/cucumber-html-report", "json:target/cucumber.json"}, glue = {"classpath:domainapp.integtests.specglue"}, strict = true, tags = {"~@backlog", "~@ignore"}) public class RunSpecs { // intentionally empty } modules/000077500000000000000000000000001264154357600340245ustar00rootroot00000000000000java-design-patterns-1.9.0/naked-objects/integtests/src/test/java/domainapp/integtests/specssimple/000077500000000000000000000000001264154357600353155ustar00rootroot00000000000000java-design-patterns-1.9.0/naked-objects/integtests/src/test/java/domainapp/integtests/specs/modulesSimpleObjectSpec_listAllAndCreate.feature000066400000000000000000000020661264154357600453240ustar00rootroot00000000000000java-design-patterns-1.9.0/naked-objects/integtests/src/test/java/domainapp/integtests/specs/modules/simple# # Licensed to the Apache Software Foundation (ASF) under one or more # contributor license agreements. See the NOTICE file distributed with # this work for additional information regarding copyright ownership. # The ASF licenses this file to You under the Apache License, Version 2.0 # (the "License"); you may not use this file except in compliance with # the License. You may obtain a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, software # distributed under the License is distributed on an "AS IS" BASIS, # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. # See the License for the specific language governing permissions and # limitations under the License. # @SimpleObjectsFixture Feature: List and Create New Simple Objects @integration Scenario: Existing simple objects can be listed and new ones created Given there are initially 3 simple objects When I create a new simple object Then there are 4 simple objects java-design-patterns-1.9.0/naked-objects/integtests/src/test/java/domainapp/integtests/tests/000077500000000000000000000000001264154357600324605ustar00rootroot00000000000000SimpleAppIntegTest.java000066400000000000000000000026721264154357600367740ustar00rootroot00000000000000java-design-patterns-1.9.0/naked-objects/integtests/src/test/java/domainapp/integtests/tests/* * Licensed to the Apache Software Foundation (ASF) under one * or more contributor license agreements. See the NOTICE file * distributed with this work for additional information * regarding copyright ownership. The ASF licenses this file * to you under the Apache License, Version 2.0 (the * "License"); you may not use this file except in compliance * with the License. You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, * software distributed under the License is distributed on an * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY * KIND, either express or implied. See the License for the * specific language governing permissions and limitations * under the License. */ package domainapp.integtests.tests; import org.junit.BeforeClass; import org.apache.isis.core.integtestsupport.IntegrationTestAbstract; import org.apache.isis.core.integtestsupport.scenarios.ScenarioExecutionForIntegration; import domainapp.integtests.bootstrap.SimpleAppSystemInitializer; public abstract class SimpleAppIntegTest extends IntegrationTestAbstract { @BeforeClass public static void initClass() { org.apache.log4j.PropertyConfigurator.configure("logging.properties"); SimpleAppSystemInitializer.initIsft(); // instantiating will install onto ThreadLocal new ScenarioExecutionForIntegration(); } } modules/000077500000000000000000000000001264154357600340515ustar00rootroot00000000000000java-design-patterns-1.9.0/naked-objects/integtests/src/test/java/domainapp/integtests/testssimple/000077500000000000000000000000001264154357600353425ustar00rootroot00000000000000java-design-patterns-1.9.0/naked-objects/integtests/src/test/java/domainapp/integtests/tests/modulesSimpleObjectIntegTest.java000066400000000000000000000065201264154357600424170ustar00rootroot00000000000000java-design-patterns-1.9.0/naked-objects/integtests/src/test/java/domainapp/integtests/tests/modules/simple/* * Licensed to the Apache Software Foundation (ASF) under one * or more contributor license agreements. See the NOTICE file * distributed with this work for additional information * regarding copyright ownership. The ASF licenses this file * to you under the Apache License, Version 2.0 (the * "License"); you may not use this file except in compliance * with the License. You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, * software distributed under the License is distributed on an * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY * KIND, either express or implied. See the License for the * specific language governing permissions and limitations * under the License. */ package domainapp.integtests.tests.modules.simple; import javax.inject.Inject; import org.junit.Before; import org.junit.Test; import org.apache.isis.applib.DomainObjectContainer; import org.apache.isis.applib.fixturescripts.FixtureScripts; import org.apache.isis.applib.services.wrapper.DisabledException; import org.apache.isis.applib.services.wrapper.InvalidException; import domainapp.dom.modules.simple.SimpleObject; import domainapp.fixture.scenarios.RecreateSimpleObjects; import domainapp.integtests.tests.SimpleAppIntegTest; import static org.assertj.core.api.Assertions.assertThat; public class SimpleObjectIntegTest extends SimpleAppIntegTest { @Inject FixtureScripts fixtureScripts; RecreateSimpleObjects fs; SimpleObject simpleObjectPojo; SimpleObject simpleObjectWrapped; @Before public void setUp() throws Exception { // given fs = new RecreateSimpleObjects().setNumber(1); fixtureScripts.runFixtureScript(fs, null); simpleObjectPojo = fs.getSimpleObjects().get(0); assertThat(simpleObjectPojo).isNotNull(); simpleObjectWrapped = wrap(simpleObjectPojo); } public static class Name extends SimpleObjectIntegTest { @Test public void accessible() throws Exception { // when final String name = simpleObjectWrapped.getName(); // then assertThat(name).isEqualTo(fs.names.get(0)); } @Test public void cannotBeUpdatedDirectly() throws Exception { // expect expectedExceptions.expect(DisabledException.class); // when simpleObjectWrapped.setName("new name"); } } public static class UpdateName extends SimpleObjectIntegTest { @Test public void happyCase() throws Exception { // when simpleObjectWrapped.updateName("new name"); // then assertThat(simpleObjectWrapped.getName()).isEqualTo("new name"); } @Test public void failsValidation() throws Exception { // expect expectedExceptions.expect(InvalidException.class); expectedExceptions.expectMessage("Exclamation mark is not allowed"); // when simpleObjectWrapped.updateName("new name!"); } } public static class Title extends SimpleObjectIntegTest { @Inject DomainObjectContainer container; @Test public void interpolatesName() throws Exception { // given final String name = simpleObjectWrapped.getName(); // when final String title = container.titleOf(simpleObjectWrapped); // then assertThat(title).isEqualTo("Object: " + name); } } }SimpleObjectsIntegTest.java000066400000000000000000000103401264154357600425750ustar00rootroot00000000000000java-design-patterns-1.9.0/naked-objects/integtests/src/test/java/domainapp/integtests/tests/modules/simple/* * Licensed to the Apache Software Foundation (ASF) under one * or more contributor license agreements. See the NOTICE file * distributed with this work for additional information * regarding copyright ownership. The ASF licenses this file * to you under the Apache License, Version 2.0 (the * "License"); you may not use this file except in compliance * with the License. You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, * software distributed under the License is distributed on an * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY * KIND, either express or implied. See the License for the * specific language governing permissions and limitations * under the License. */ package domainapp.integtests.tests.modules.simple; import java.sql.SQLIntegrityConstraintViolationException; import java.util.List; import javax.inject.Inject; import com.google.common.base.Throwables; import org.hamcrest.Description; import org.hamcrest.Matcher; import org.hamcrest.TypeSafeMatcher; import org.junit.Test; import org.apache.isis.applib.fixturescripts.FixtureScript; import org.apache.isis.applib.fixturescripts.FixtureScripts; import domainapp.dom.modules.simple.SimpleObject; import domainapp.dom.modules.simple.SimpleObjects; import domainapp.fixture.modules.simple.SimpleObjectsTearDown; import domainapp.fixture.scenarios.RecreateSimpleObjects; import domainapp.integtests.tests.SimpleAppIntegTest; import static org.assertj.core.api.Assertions.assertThat; public class SimpleObjectsIntegTest extends SimpleAppIntegTest { @Inject FixtureScripts fixtureScripts; @Inject SimpleObjects simpleObjects; public static class ListAll extends SimpleObjectsIntegTest { @Test public void happyCase() throws Exception { // given RecreateSimpleObjects fs = new RecreateSimpleObjects(); fixtureScripts.runFixtureScript(fs, null); nextTransaction(); // when final List all = wrap(simpleObjects).listAll(); // then assertThat(all).hasSize(fs.getSimpleObjects().size()); SimpleObject simpleObject = wrap(all.get(0)); assertThat(simpleObject.getName()).isEqualTo(fs.getSimpleObjects().get(0).getName()); } @Test public void whenNone() throws Exception { // given FixtureScript fs = new SimpleObjectsTearDown(); fixtureScripts.runFixtureScript(fs, null); nextTransaction(); // when final List all = wrap(simpleObjects).listAll(); // then assertThat(all).hasSize(0); } } public static class Create extends SimpleObjectsIntegTest { @Test public void happyCase() throws Exception { // given FixtureScript fs = new SimpleObjectsTearDown(); fixtureScripts.runFixtureScript(fs, null); nextTransaction(); // when wrap(simpleObjects).create("Faz"); // then final List all = wrap(simpleObjects).listAll(); assertThat(all).hasSize(1); } @Test public void whenAlreadyExists() throws Exception { // given FixtureScript fs = new SimpleObjectsTearDown(); fixtureScripts.runFixtureScript(fs, null); nextTransaction(); wrap(simpleObjects).create("Faz"); nextTransaction(); // then expectedExceptions.expectCause(causalChainContains(SQLIntegrityConstraintViolationException.class)); // when wrap(simpleObjects).create("Faz"); nextTransaction(); } private static Matcher causalChainContains(final Class cls) { return new TypeSafeMatcher() { @Override protected boolean matchesSafely(Throwable item) { final List causalChain = Throwables.getCausalChain(item); for (Throwable throwable : causalChain) { if (cls.isAssignableFrom(throwable.getClass())) { return true; } } return false; } @Override public void describeTo(Description description) { description.appendText("exception with causal chain containing " + cls.getSimpleName()); } }; } } }java-design-patterns-1.9.0/naked-objects/pom.xml000066400000000000000000000321261264154357600216160ustar00rootroot00000000000000 4.0.0 java-design-patterns com.iluwatar 1.9.0 naked-objects pom 3.0.4 1.9.0 UTF-8 UTF-8 2.0.0 apache.snapshots Apache Snapshots https://repository.apache.org/content/repositories/snapshots/ false Cloudbees snapshots http://repository-estatio.forge.cloudbees.com/snapshot/ false org.apache.maven.plugins maven-enforcer-plugin 1.3.1 [3.2.1,) [1.8.0,) All plugin versions must be defined! true true validate-enforce validate enforce org.apache.maven.plugins maven-compiler-plugin 3.1 1.8 1.8 -parameters source compile test test-compile org.apache.maven.plugins maven-surefire-plugin 2.16 **/*Test.java **/*Test$*.java **/*Test_*.java **/*Spec*.java **/Test*.java **/*ForTesting.java **/*Abstract*.java true true ${project.build.directory}/surefire-reports org.apache.maven.plugins maven-surefire-report-plugin 2.16 false test maven-clean-plugin 2.5 maven-resources-plugin 2.6 maven-jar-plugin 2.4 maven-install-plugin 2.5.1 maven-deploy-plugin 2.8.1 maven-site-plugin 3.3 maven-war-plugin 2.4 org.mortbay.jetty maven-jetty-plugin 6.1.26 org.apache.maven.plugins maven-shade-plugin 2.2 org.apache.maven.plugins maven-antrun-plugin 1.7 run org.simplericity.jettyconsole jetty-console-maven-plugin 1.56 org.apache.rat apache-rat-plugin 0.10 true true **/target/** **/target-ide/** **/*.project **/.classpath **/.settings/** **/*.launch **/ide/eclipse/launch/** **/ide/intellij/launch/** src/site/resources/ide/eclipse/** **/rebel.xml **/*.gitignore **/*.log **/*.pdn **/*.svg **/*.json **/*.min.js **/*.js **/translations.pot **/translations*.po AL2 Apache License 2.0 Licensed to the Apache Software Foundation (ASF) under one JQRY MIT Dual licensed under the MIT or GPL Version 2 licenses. JMOCK JMock Copyright (c) 2000-2007, jMock.org DOCBK DocBook 4.5 Permission to copy in any form is granted for use Permission to use, copy, modify and distribute the DocBook DTD is hereby granted in perpetuity, provided that the above copyright This is the catalog data file for DocBook XML V4.5. It is provided as XML Catalog data for DocBook XML V4.5 DocBook additional general entities V4.5 XML EXCHANGE TABLE MODEL DECLARATION MODULE W3C XHTML Copyright (c) 1998-2002 W3C (MIT, INRIA, Keio), Apache License 2.0 MIT JMock DocBook 4.5 XHTML org.apache.maven.plugins maven-compiler-plugin org.apache.maven.plugins maven-surefire-report-plugin org.apache.isis.core isis ${isis.version} pom import org.apache.isis.viewer isis-viewer-wicket ${isis.version} pom import org.assertj assertj-core ${assertj-core.version} ${project.groupId} naked-objects-dom 1.9.0 ${project.groupId} naked-objects-fixture 1.9.0 ${project.groupId} naked-objects-webapp 1.9.0 m2e m2e.version target-ide dom fixture integtests webapp java-design-patterns-1.9.0/naked-objects/webapp/000077500000000000000000000000001264154357600215535ustar00rootroot00000000000000java-design-patterns-1.9.0/naked-objects/webapp/ide/000077500000000000000000000000001264154357600223145ustar00rootroot00000000000000java-design-patterns-1.9.0/naked-objects/webapp/ide/eclipse/000077500000000000000000000000001264154357600237405ustar00rootroot00000000000000java-design-patterns-1.9.0/naked-objects/webapp/ide/eclipse/launch/000077500000000000000000000000001264154357600252125ustar00rootroot00000000000000java-design-patterns-1.9.0/naked-objects/webapp/ide/eclipse/launch/.gitignore000066400000000000000000000004641264154357600272060ustar00rootroot00000000000000/SimpleApp-PROTOTYPE-jrebel.launch /SimpleApp-PROTOTYPE-no-fixtures.launch /SimpleApp-PROTOTYPE-with-fixtures.launch /SimpleApp-SERVER-no-fixtures.launch /SimpleApp-PROTOTYPE-jrebel.launch /SimpleApp-PROTOTYPE-no-fixtures.launch /SimpleApp-PROTOTYPE-with-fixtures.launch /SimpleApp-SERVER-no-fixtures.launch java-design-patterns-1.9.0/naked-objects/webapp/ide/intellij/000077500000000000000000000000001264154357600241265ustar00rootroot00000000000000java-design-patterns-1.9.0/naked-objects/webapp/ide/intellij/launch/000077500000000000000000000000001264154357600254005ustar00rootroot00000000000000java-design-patterns-1.9.0/naked-objects/webapp/ide/intellij/launch/README.txt000066400000000000000000000001371264154357600270770ustar00rootroot00000000000000Copy into workspace\.idea\runConfigurations directory, and adjust file paths for Maven tasks. java-design-patterns-1.9.0/naked-objects/webapp/ide/intellij/launch/SimpleApp_PROTOTYPE.xml000066400000000000000000000026431264154357600315060ustar00rootroot00000000000000 java-design-patterns-1.9.0/naked-objects/webapp/ide/intellij/launch/SimpleApp__enhance_only_.xml000066400000000000000000000022041264154357600330320ustar00rootroot00000000000000 s java-design-patterns-1.9.0/naked-objects/webapp/lib/000077500000000000000000000000001264154357600223215ustar00rootroot00000000000000java-design-patterns-1.9.0/naked-objects/webapp/lib/.gitignore000066400000000000000000000001361264154357600243110ustar00rootroot00000000000000# # explicitly ignoring Microsoft JDBC4 jar # (cannot redistribute, licensing) # sqljdbc4.jar java-design-patterns-1.9.0/naked-objects/webapp/pom.xml000066400000000000000000000246221264154357600230760ustar00rootroot00000000000000 4.0.0 com.iluwatar naked-objects 1.9.0 naked-objects-webapp This module runs both the Wicket viewer and the Restfulobjects viewer in a single webapp configured to run using the datanucleus object store. war .. org.mortbay.jetty maven-jetty-plugin org.simplericity.jettyconsole jetty-console-maven-plugin createconsole ${basedir}/src/main/jettyconsole/isis-banner.png ${project.build.directory}/${project.build.finalName}-jetty-console.jar package org.codehaus.mojo build-helper-maven-plugin 1.8 validate maven-version maven-war-plugin simpleapp false ${maven.build.timestamp} ${agent.name} ${user.name} Maven ${maven.version} ${java.version} ${os.name} ${project.version} WEB-INF/lib/isis-core-webserver*.jar, WEB-INF/lib/javax.servlet-api-*.jar, WEB-INF/lib/javax.websocket-api-*.jar, WEB-INF/lib/jetty-all-*.jar org.eclipse.m2e lifecycle-mapping 1.0.0 org.codehaus.mojo build-helper-maven-plugin [1.5,) maven-version ${project.groupId} naked-objects-dom org.datanucleus datanucleus-enhancer ${project.groupId} naked-objects-fixture org.datanucleus datanucleus-enhancer org.apache.isis.viewer isis-viewer-wicket-impl org.apache.isis.core isis-core-viewer-restfulobjects-server org.apache.isis.core isis-core-security-shiro org.apache.isis.core isis-core-runtime org.apache.isis.core isis-core-wrapper org.apache.isis.core isis-core-security org.apache.isis.core isis-core-webserver runtime true org.apache.geronimo.specs geronimo-servlet_3.0_spec org.hsqldb hsqldb org.lazyluke log4jdbc-remix org.slf4j slf4j-api self-host org.apache.maven.plugins maven-antrun-plugin intellij idea.version org.apache.geronimo.specs geronimo-servlet_3.0_spec compile jrebel target dom.simple,org.apache.isis.objectstore.jdo.applib warn org.apache.maven.plugins maven-antrun-plugin java-design-patterns-1.9.0/naked-objects/webapp/src/000077500000000000000000000000001264154357600223425ustar00rootroot00000000000000java-design-patterns-1.9.0/naked-objects/webapp/src/main/000077500000000000000000000000001264154357600232665ustar00rootroot00000000000000java-design-patterns-1.9.0/naked-objects/webapp/src/main/java/000077500000000000000000000000001264154357600242075ustar00rootroot00000000000000java-design-patterns-1.9.0/naked-objects/webapp/src/main/java/domainapp/000077500000000000000000000000001264154357600261575ustar00rootroot00000000000000java-design-patterns-1.9.0/naked-objects/webapp/src/main/java/domainapp/webapp/000077500000000000000000000000001264154357600274355ustar00rootroot00000000000000SimpleApplication.java000066400000000000000000000130501264154357600336350ustar00rootroot00000000000000java-design-patterns-1.9.0/naked-objects/webapp/src/main/java/domainapp/webapp/* * Licensed to the Apache Software Foundation (ASF) under one or more contributor license * agreements. See the NOTICE file distributed with this work for additional information regarding * copyright ownership. The ASF licenses this file to you under the Apache License, Version 2.0 (the * "License"); you may not use this file except in compliance with the License. You may obtain a * copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software distributed under the License * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express * or implied. See the License for the specific language governing permissions and limitations under * the License. */ package domainapp.webapp; import java.io.IOException; import java.io.InputStream; import java.nio.charset.Charset; import java.util.List; import javax.servlet.http.HttpServletRequest; import com.google.common.base.Joiner; import com.google.common.io.Resources; import com.google.inject.AbstractModule; import com.google.inject.Module; import com.google.inject.name.Names; import com.google.inject.util.Modules; import com.google.inject.util.Providers; import org.apache.wicket.Session; import org.apache.wicket.request.IRequestParameters; import org.apache.wicket.request.Request; import org.apache.wicket.request.Response; import org.apache.wicket.request.http.WebRequest; import org.apache.isis.viewer.wicket.viewer.IsisWicketApplication; import org.apache.isis.viewer.wicket.viewer.integration.wicket.AuthenticatedWebSessionForIsis; import de.agilecoders.wicket.core.Bootstrap; import de.agilecoders.wicket.core.settings.IBootstrapSettings; import de.agilecoders.wicket.themes.markup.html.bootswatch.BootswatchTheme; import de.agilecoders.wicket.themes.markup.html.bootswatch.BootswatchThemeProvider; /** * As specified in web.xml. * *

* See: * * 

 * <filter>
 *   <filter-name>wicket</filter-name>
 *    <filter-class>org.apache.wicket.protocol.http.WicketFilter</filter-class>
 *    <init-param>
 *      <param-name>applicationClassName</param-name>
 *      <param-value>webapp.SimpleApplication</param-value>
 *    </init-param>
 * </filter>
 *
* */ public class SimpleApplication extends IsisWicketApplication { private static final long serialVersionUID = 1L; /** * uncomment for a (slightly hacky) way of allowing logins using query args, eg: * * ?user=sven&pass=pass * *

* for demos only, obvious. */ private static final boolean DEMO_MODE_USING_CREDENTIALS_AS_QUERYARGS = false; @Override protected void init() { super.init(); IBootstrapSettings settings = Bootstrap.getSettings(); settings.setThemeProvider(new BootswatchThemeProvider(BootswatchTheme.Flatly)); } @Override public Session newSession(final Request request, final Response response) { if (!DEMO_MODE_USING_CREDENTIALS_AS_QUERYARGS) { return super.newSession(request, response); } // else demo mode final AuthenticatedWebSessionForIsis s = (AuthenticatedWebSessionForIsis) super.newSession(request, response); IRequestParameters requestParameters = request.getRequestParameters(); final org.apache.wicket.util.string.StringValue user = requestParameters.getParameterValue("user"); final org.apache.wicket.util.string.StringValue password = requestParameters.getParameterValue("pass"); s.signIn(user.toString(), password.toString()); return s; } @Override public WebRequest newWebRequest(HttpServletRequest servletRequest, String filterPath) { if (!DEMO_MODE_USING_CREDENTIALS_AS_QUERYARGS) { return super.newWebRequest(servletRequest, filterPath); } // else demo mode try { String uname = servletRequest.getParameter("user"); if (uname != null) { servletRequest.getSession().invalidate(); } } catch (Exception e) { System.out.println(e); } WebRequest request = super.newWebRequest(servletRequest, filterPath); return request; } @Override protected Module newIsisWicketModule() { final Module isisDefaults = super.newIsisWicketModule(); final Module overrides = new AbstractModule() { @Override protected void configure() { bind(String.class).annotatedWith(Names.named("applicationName")).toInstance("Simple App"); bind(String.class).annotatedWith(Names.named("applicationCss")).toInstance( "css/application.css"); bind(String.class).annotatedWith(Names.named("applicationJs")).toInstance( "scripts/application.js"); bind(String.class).annotatedWith(Names.named("welcomeMessage")).toInstance( readLines(getClass(), "welcome.html")); bind(String.class).annotatedWith(Names.named("aboutMessage")).toInstance("Simple App"); bind(InputStream.class).annotatedWith(Names.named("metaInfManifest")).toProvider( Providers.of(getServletContext().getResourceAsStream("/META-INF/MANIFEST.MF"))); } }; return Modules.override(isisDefaults).with(overrides); } private static String readLines(final Class contextClass, final String resourceName) { try { List readLines = Resources.readLines(Resources.getResource(contextClass, resourceName), Charset.defaultCharset()); final String aboutText = Joiner.on("\n").join(readLines); return aboutText; } catch (IOException e) { return "This is a simple app"; } } } java-design-patterns-1.9.0/naked-objects/webapp/src/main/jettyconsole/000077500000000000000000000000001264154357600260105ustar00rootroot00000000000000java-design-patterns-1.9.0/naked-objects/webapp/src/main/jettyconsole/isis-banner.pdn000066400000000000000000002100321264154357600307230ustar00rootroot00000000000000PDN36 PPaintDotNet.Data, Version=3.510.4297.28969, Culture=neutral, PublicKeyToken=null ISystem, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089PaintDotNet.Document isDisposedlayerswidthheight savedWith userMetaDatauserMetadataItemsPaintDotNet.LayerListSystem.Version2System.Collections.Specialized.NameValueCollectionSystem.Collections.Generic.KeyValuePair`2[[System.String, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089],[System.String, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]][] w   PaintDotNet.LayerListparentArrayList+_itemsArrayList+_sizeArrayList+_versionPaintDotNet.Document  ASystem.Version_Major_Minor_Build _Revision$q2System.Collections.Specialized.NameValueCollectionReadOnly HashProviderComparerCountKeysValuesVersion2System.Collections.CaseInsensitiveHashCodeProvider*System.Collections.CaseInsensitiveComparer  System.Collections.Generic.KeyValuePair`2[[System.String, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089],[System.String, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]]System.Collections.Generic.KeyValuePair`2[[System.String, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089],[System.String, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]]keyvalue $exif.tag4D $exif.tag5/ $exif.tag67 $exif.tag77        2System.Collections.CaseInsensitiveHashCodeProviderm_textSystem.Globalization.TextInfo  *System.Collections.CaseInsensitiveComparer m_compareInfo System.Globalization.CompareInfo        % & ' ( )PPaintDotNet.Core, Version=3.510.4297.28965, Culture=neutral, PublicKeyToken=nullPaintDotNet.BitmapLayer propertiessurfaceLayer+isDisposed Layer+width Layer+heightLayer+properties-PaintDotNet.BitmapLayer+BitmapLayerPropertiesPaintDotNet.Surface)!PaintDotNet.Layer+LayerProperties * +w , - .w / 0 1w 2 3 4w 5 6 7w 8System.Globalization.TextInfom_listSeparator m_isReadOnlycustomCultureName m_nDataItemm_useUserOverride m_win32LangID   System.Globalization.CompareInfo win32LCIDculturem_name9%System.Collections.ArrayList_items_size_version :&% ;'% <(% =*-PaintDotNet.BitmapLayer+BitmapLayerPropertiesblendOp&PaintDotNet.UserBlendOps+NormalBlendOp >+PaintDotNet.Surfacescan0widthheightstridePaintDotNet.MemoryBlock)) ?w@,!PaintDotNet.Layer+LayerPropertiesname userMetaDatauserMetadataItemsvisible isBackgroundopacity2System.Collections.Specialized.NameValueCollectionSystem.Collections.Generic.KeyValuePair`2[[System.String, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089],[System.String, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]][]@Layer 2 A B-* C.+ Dw@/,ELayer 5 F B0* H1+ Iw@2,JLayer 3 K B3* M4+ Nw@5,OLayer 4 P B6* R7+ Sw@8,TLayer 5 U B: ; 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Q@IENDB`java-design-patterns-1.9.0/naked-objects/webapp/src/main/resources/000077500000000000000000000000001264154357600253005ustar00rootroot00000000000000java-design-patterns-1.9.0/naked-objects/webapp/src/main/resources/domainapp/000077500000000000000000000000001264154357600272505ustar00rootroot00000000000000java-design-patterns-1.9.0/naked-objects/webapp/src/main/resources/domainapp/webapp/000077500000000000000000000000001264154357600305265ustar00rootroot00000000000000java-design-patterns-1.9.0/naked-objects/webapp/src/main/resources/domainapp/webapp/welcome.html000066400000000000000000000036751264154357600330620ustar00rootroot00000000000000

Apache Isis™ is a platform to let you rapidly develop domain-driven apps in Java.

This app has been generated using Apache Isis' SimpleApp archetype, to create a purposefully minimal application that nevertheless includes fixture data, integration tests and BDD specs.

The app itself consists of a single domain class, SimpleObject, along with an equally simple (factory/repository) domain service, SimpleObjects.

For more details, see the Apache Isis website.

java-design-patterns-1.9.0/naked-objects/webapp/src/main/webapp/000077500000000000000000000000001264154357600245445ustar00rootroot00000000000000java-design-patterns-1.9.0/naked-objects/webapp/src/main/webapp/WEB-INF/000077500000000000000000000000001264154357600255735ustar00rootroot00000000000000java-design-patterns-1.9.0/naked-objects/webapp/src/main/webapp/WEB-INF/isis.properties000066400000000000000000000227311264154357600306650ustar00rootroot00000000000000# Licensed to the Apache Software Foundation (ASF) under one # or more contributor license agreements. See the NOTICE file # distributed with this work for additional information # regarding copyright ownership. The ASF licenses this file # to you under the Apache License, Version 2.0 (the # "License"); you may not use this file except in compliance # with the License. You may obtain a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, # software distributed under the License is distributed on an # "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY # KIND, either express or implied. See the License for the # specific language governing permissions and limitations # under the License. ################################################################################# # # specify system components. # # The values correspond to the named components in the installer-registry.properties file # in the org.apache.isis.core:isis-core-runtime JAR (in the org.apache.isis.core.runtime package) # # Although all configuration could reside in isis.properties, the recommendation is # to split out into component specific files: # # xxx_yyy.properties files # # where # * xxx is the component type, and # * yyy is the component name. # # For example, viewer_wicket.properties holds configuration information specific to the Wicket viewer. # ################################################################################# # # configure the persistor (object store) to use # # JDO/DataNucleus objectstore isis.persistor=datanucleus # # configure authentication mechanism to use (to logon to the system) # #isis.authentication=bypass isis.authentication=shiro # # configure authorization mechanism to use # #isis.authorization=bypass isis.authorization=shiro ################################################################################# # # MetaModel # # The metamodel typically does not require additional configuration, although # the system components (defined above) may refine the metamodel for their needs. # ################################################################################# # # Additional programming model facet factories, or remove standard facet factories. # Comma separated list of fully qualified class names. # #isis.reflector.facets.include= #isis.reflector.facets.exclude= # # Metamodel validation (in addition to that automatically performed by the programming model facet factories) # Default implementation does nothing. # # Use a custom implementation to enforce additional constraints specific to your app/project/company. # #isis.reflector.validator=org.apache.isis.core.metamodel.metamodelvalidator.dflt.MetaModelValidatorDefault # # Whether to allow deprecated annotations/method prefixes (otherwise raise metamodel validation errors). # If not specified, default is to allow. # isis.reflector.validator.allowDeprecated=false # # Implementation to use for reading dynamic layout. Default implementation reads Xxx.layout.json files from classpath. # #isis.reflector.layoutMetadataReaders=org.apache.isis.core.metamodel.layoutmetadata.json.LayoutMetadataReaderFromJson # # patterns for applying CssClassFa facet (font-awesome icons), matching on action names # isis.reflector.facet.cssClassFa.patterns=\ new.*:fa-plus,\ add.*:fa-plus-square,\ create.*:fa-plus,\ update.*:fa-edit,\ change.*:fa-edit,\ remove.*:fa-minus-square,\ move.*:fa-exchange,\ first.*:fa-star,\ find.*:fa-search,\ lookup.*:fa-search,\ clear.*:fa-remove,\ previous.*:fa-step-backward,\ next.*:fa-step-forward,\ list.*:fa-list, \ all.*:fa-list, \ download.*:fa-download, \ upload.*:fa-upload, \ execute.*:fa-bolt, \ run.*:fa-bolt, \ calculate.*:fa-calculator, \ verify.*:fa-check-circle, \ refresh.*:fa-refresh, \ install.*:fa-wrench # # patterns for applying CssClass facet (CSS styles), matching on member names # isis.reflector.facet.cssClass.patterns=\ delete.*:btn-warning ################################################################################# # # Value facet defaults # # (see also viewer-specific config files, eg viewer_wicket.properties) # ################################################################################# # as used by @Title of a date isis.value.format.date=dd-MM-yyyy ################################################################################# # # Application Services and fixtures # ################################################################################# # # Specify the domain services. # # These are the most important configuration properties in the system, as they define # the set of the classes for Isis to instantiate as domain service singletons. # From these domain service instances the rest of the metamodel is discovered, while the # end-user gains access to other domain objects by invoking the actions of the domain services. # isis.services-installer=configuration-and-annotation isis.services.ServicesInstallerFromAnnotation.packagePrefix=domainapp # additional services/overriding default (@DomainService) implementations isis.services = # Specify the (optional) test fixtures # # Fixtures are used to seed the object store with an initial set of data. For the # in-memory object store, the fixtures are installed on every run. For other # object stores, they are used only when the object store is first initialized. # isis.fixtures=domainapp.fixture.scenarios.RecreateSimpleObjects # # required by EmailServiceDefault # #isis.service.email.sender.address=some.valid@email.address #isis.service.email.sender.password=the.password.for-isis.notification.email.sender.address # # whether ExceptionRecognizers should also log any recognized exceptions # (default false; enable for diagnostics/debugging) # #isis.services.exceprecog.logRecognizedExceptions=true # # disable to (automatically registered) ExceptionRecognizerCompositeForJdoObjectStore service # almost all of this service should be registered. Since all exception recognizer implementations # are consulted in the event of an exception, it's not sufficient to override the implementation # (in isis.services); instead this configuration property disables this particular implementation. # #isis.services.ExceptionRecognizerCompositeForJdoObjectStore.disable=true ################################################################################ # # Auditing, Publishing, Command # ################################################################################ # # Whether changes to objects should be audited; if not set, defaults to "none" # - if not set or set to "none", can explicitly enable using @DomainObject(auditing=Auditing.ENABLED) # - if set to "all", can explicitly disable using @Object(auditing=Auditing.DISABLED) # #isis.services.audit.objects=all|none # # Whether changes to objects should be published; if not set, defaults to "none" # - if not set or set to "none", can explicitly enable using @DomainObject(publishing=Publishing.ENABLED) # - if set to "all", can explicitly disable using @Object(publishing=Publishing.DISABLED) # #isis.services.publish.objects=all|none # # Whether all (or all non-query only) actions should be published; if not set, defaults to "none" # - if not set or set to "none", can explicitly enable using @Action(publishing=Publishing.ENABLED) # - if set to "all", can explicitly disable using @Action(publishing=Publishing.DISABLED) # #isis.services.publish.actions=all|none|ignoreQueryOnly # # Whether all (or all non-query only) actions should be reified as commands; if not set, defaults to "none" # - if not set or set to "none", can explicitly enable using @Action(command=CommandReification.ENABLED) # - if set to "all", can explicitly disable using @Action(command=CommandReification.DISABLED) # #isis.services.command.actions=all|none|ignoreQueryOnly ################################################################################ # # Policies # ################################################################################# # # Whether editing of object properties is allowed; if not set, defaults to "true" # - if not set or set to "true", can explicitly disable using @DomainObject(editing=Editing.DISABLED) # - if set to "false", can explicitly enable using @DomainObject(editing=Editing.ENABLED) # #isis.objects.editing=true|false ################################################################################ # # i18n # ################################################################################# # # force read translations, even if running in prototype mode # #isis.services.translation.po.mode=read ################################################################################ # # Viewer defaults # ################################################################################# # # Specify viewer defaults # #isis.viewers.paged.standalone=30 #isis.viewers.paged.parented=10 #isis.viewers.propertyLayout.labelPosition=LEFT #isis.viewers.parameterLayout.labelPosition=LEFT java-design-patterns-1.9.0/naked-objects/webapp/src/main/webapp/WEB-INF/logging.properties000066400000000000000000000174141264154357600313460ustar00rootroot00000000000000# Licensed to the Apache Software Foundation (ASF) under one # or more contributor license agreements. See the NOTICE file # distributed with this work for additional information # regarding copyright ownership. The ASF licenses this file # to you under the Apache License, Version 2.0 (the # "License"); you may not use this file except in compliance # with the License. You may obtain a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, # software distributed under the License is distributed on an # "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY # KIND, either express or implied. See the License for the # specific language governing permissions and limitations # under the License. # # Isis uses log4j is used to provide system logging # log4j.rootCategory=INFO, Console #log4j.rootCategory=DEBUG, Console # The console appender log4j.appender.Console=org.apache.log4j.ConsoleAppender log4j.appender.Console.target=System.out log4j.appender.Console.layout=org.apache.log4j.PatternLayout log4j.appender.Console.layout.ConversionPattern=%d{ABSOLUTE} [%-20c{1} %-10t %-5p] %m%n # The stderr appender log4j.appender.Stderr=org.apache.log4j.ConsoleAppender log4j.appender.Stderr.target=System.err log4j.appender.Stderr.layout=org.apache.log4j.PatternLayout log4j.appender.Stderr.layout.ConversionPattern=%d{ABSOLUTE} [%-20c{1} %-10t %-5p] %m%n # other appenders log4j.appender.File=org.apache.log4j.RollingFileAppender log4j.appender.File.file=isis.log log4j.appender.File.append=false log4j.appender.File.layout=org.apache.log4j.PatternLayout log4j.appender.File.layout.ConversionPattern=%d [%-20c{1} %-10t %-5p] %m%n log4j.appender.sql=org.apache.log4j.FileAppender log4j.appender.sql.File=./logs/sql.log log4j.appender.sql.Append=false log4j.appender.sql.layout=org.apache.log4j.PatternLayout log4j.appender.sql.layout.ConversionPattern=-----> %d{yyyy-MM-dd HH:mm:ss.SSS} %m%n%n log4j.appender.sqltiming=org.apache.log4j.FileAppender log4j.appender.sqltiming.File=./logs/sqltiming.log log4j.appender.sqltiming.Append=false log4j.appender.sqltiming.layout=org.apache.log4j.PatternLayout log4j.appender.sqltiming.layout.ConversionPattern=-----> %d{yyyy-MM-dd HH:mm:ss.SSS} %m%n%n log4j.appender.jdbc=org.apache.log4j.FileAppender log4j.appender.jdbc.File=./logs/jdbc.log log4j.appender.jdbc.Append=false log4j.appender.jdbc.layout=org.apache.log4j.PatternLayout log4j.appender.jdbc.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss.SSS} %m%n log4j.appender.connection=org.apache.log4j.FileAppender log4j.appender.connection.File=./logs/connection.log log4j.appender.connection.Append=false log4j.appender.connection.layout=org.apache.log4j.PatternLayout log4j.appender.connection.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss.SSS} %m%n ! turn on the internal log4j debugging flag so we can see what it is doing #log4j.debug=true # DataNucleus # the first two log the DML and DDL (if set to DEBUG) log4j.logger.DataNucleus.Datastore.Native=WARN, Console log4j.logger.DataNucleus.Datastore.Schema=DEBUG, Console # the remainder can probably be left to WARN log4j.logger.DataNucleus.Persistence=WARN, Console log4j.logger.DataNucleus.Transaction=WARN, Console log4j.logger.DataNucleus.Connection=WARN, Console log4j.logger.DataNucleus.Query=WARN, Console log4j.logger.DataNucleus.Cache=WARN, Console log4j.logger.DataNucleus.MetaData=WARN, Console log4j.logger.DataNucleus.Datastore=WARN, Console log4j.logger.DataNucleus.Datastore.Persist=WARN, Console log4j.logger.DataNucleus.Datastore.Retrieve=WARN, Console log4j.logger.DataNucleus.General=WARN, Console log4j.logger.DataNucleus.Lifecycle=WARN, Console log4j.logger.DataNucleus.ValueGeneration=WARN, Console log4j.logger.DataNucleus.Enhancer=WARN, Console log4j.logger.DataNucleus.SchemaTool=ERROR, Console log4j.logger.DataNucleus.JDO=WARN, Console log4j.logger.DataNucleus.JPA=ERROR, Console log4j.logger.DataNucleus.JCA=WARN, Console log4j.logger.DataNucleus.IDE=ERROR, Console log4j.additivity.DataNucleus.Datastore.Native=false log4j.additivity.DataNucleus.Datastore.Schema=false log4j.additivity.DataNucleus.Datastore.Persistence=false log4j.additivity.DataNucleus.Datastore.Transaction=false log4j.additivity.DataNucleus.Datastore.Connection=false log4j.additivity.DataNucleus.Datastore.Query=false log4j.additivity.DataNucleus.Datastore.Cache=false log4j.additivity.DataNucleus.Datastore.MetaData=false log4j.additivity.DataNucleus.Datastore.Datastore=false log4j.additivity.DataNucleus.Datastore.Datastore.Persist=false log4j.additivity.DataNucleus.Datastore.Datastore.Retrieve=false log4j.additivity.DataNucleus.Datastore.General=false log4j.additivity.DataNucleus.Datastore.Lifecycle=false log4j.additivity.DataNucleus.Datastore.ValueGeneration=false log4j.additivity.DataNucleus.Datastore.Enhancer=false log4j.additivity.DataNucleus.Datastore.SchemaTool=false log4j.additivity.DataNucleus.Datastore.JDO=false log4j.additivity.DataNucleus.Datastore.JPA=false log4j.additivity.DataNucleus.Datastore.JCA=false log4j.additivity.DataNucleus.Datastore.IDE=false # if using log4jdbc-remix as JDBC driver #log4j.logger.jdbc.sqlonly=DEBUG, sql, Console #log4j.additivity.jdbc.sqlonly=false #log4j.logger.jdbc.resultsettable=DEBUG, jdbc, Console #log4j.additivity.jdbc.resultsettable=false #log4j.logger.jdbc.audit=WARN,jdbc, Console #log4j.additivity.jdbc.audit=false #log4j.logger.jdbc.resultset=WARN,jdbc #log4j.additivity.jdbc.resultset=false #log4j.logger.jdbc.sqltiming=WARN,sqltiming #log4j.additivity.jdbc.sqltiming=false #log4j.logger.jdbc.connection=FATAL,connection #log4j.additivity.jdbc.connection=false # track Isis/JDO lifecycle integration #log4j.logger.org.apache.isis.runtimes.dflt.objectstores.jdo.datanucleus.persistence.FrameworkSynchronizer=DEBUG, Console #log4j.additivity.org.apache.isis.runtimes.dflt.objectstores.jdo.datanucleus.persistence.FrameworkSynchronizer=false #log4j.logger.org.apache.isis.objectstore.jdo.datanucleus.persistence.IsisLifecycleListener=DEBUG,Console #log4j.additivity.org.apache.isis.objectstore.jdo.datanucleus.persistence.IsisLifecycleListener=false # track Isis/Wicket lifecycle integration #log4j.logger.org.apache.isis.viewer.wicket.viewer.integration.wicket.WebRequestCycleForIsis=DEBUG, Console #log4j.additivity.org.apache.isis.viewer.wicket.viewer.integration.wicket.WebRequestCycleForIsis=false #log4j.logger.org.apache.isis.viewer.wicket.viewer.integration.isis.IsisContextForWicket=INFO,Console #log4j.additivity.org.apache.isis.viewer.wicket.viewer.integration.isis.IsisContextForWicket=false # quieten some of the noisier classes in Isis' bootstrapping log4j.logger.org.apache.isis.core.metamodel.specloader.specimpl.FacetedMethodsBuilder=WARN,Console log4j.additivity.org.apache.isis.core.metamodel.specloader.specimpl.FacetedMethodsBuilder=false log4j.logger.org.apache.isis.core.metamodel.specloader.ServiceInitializer=WARN,Console log4j.additivity.org.apache.isis.core.metamodel.specloader.ServiceInitializer=false log4j.logger.org.apache.isis.core.runtime.services.ServicesInstallerFromConfiguration=WARN,Console log4j.additivity.org.apache.isis.core.runtime.services.ServicesInstallerFromConfiguration=false log4j.logger.org.apache.isis.core.commons.config.IsisConfigurationDefault=WARN,Console log4j.additivity.org.apache.isis.core.commons.config.IsisConfigurationDefault=false log4j.logger.org.apache.isis.core.runtime.installers.InstallerLookupDefault=WARN,Console log4j.additivity.org.apache.isis.core.runtime.installers.InstallerLookupDefault=false # quieten Shiro log4j.logger.org.apache.shiro.realm.AuthorizingRealm=WARN,Console log4j.additivity.log4j.logger.org.apache.shiro.realm.AuthorizingRealm=false # Application-specific logging log4j.logger.dom.simple.SimpleObject=DEBUG, Stderr log4j.additivity.dom.simple.SimpleObject=falsejava-design-patterns-1.9.0/naked-objects/webapp/src/main/webapp/WEB-INF/persistor.properties000066400000000000000000000114441264154357600317470ustar00rootroot00000000000000# Licensed to the Apache Software Foundation (ASF) under one # or more contributor license agreements. See the NOTICE file # distributed with this work for additional information # regarding copyright ownership. The ASF licenses this file # to you under the Apache License, Version 2.0 (the # "License"); you may not use this file except in compliance # with the License. You may obtain a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, # software distributed under the License is distributed on an # "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY # KIND, either express or implied. See the License for the # specific language governing permissions and limitations # under the License. ################################################################################# # # Persistor # ################################################################################# # generally speaking this should not be enabled isis.persistor.disableConcurrencyChecking=false ################################################################################# # # JDBC configuration # ################################################################################# # # configuration file holding the JDO objectstore's JDBC configuration # (this is a bit of a hack... just exploiting fact that Isis also loads this file) # # # JDBC connection details # (also update the pom.xml to reference the appropriate JDBC driver) # # # HSQLDB in-memory # isis.persistor.datanucleus.impl.javax.jdo.option.ConnectionDriverName=org.hsqldb.jdbcDriver isis.persistor.datanucleus.impl.javax.jdo.option.ConnectionURL=jdbc:hsqldb:mem:test isis.persistor.datanucleus.impl.javax.jdo.option.ConnectionUserName=sa isis.persistor.datanucleus.impl.javax.jdo.option.ConnectionPassword= # # HSQLDB in-memory (using log4jdbc-remix) # #isis.persistor.datanucleus.impl.javax.jdo.option.ConnectionDriverName=net.sf.log4jdbc.DriverSpy #isis.persistor.datanucleus.impl.javax.jdo.option.ConnectionURL=jdbc:log4jdbc:hsqldb:mem:test #isis.persistor.datanucleus.impl.javax.jdo.option.ConnectionUserName=sa #isis.persistor.datanucleus.impl.javax.jdo.option.ConnectionPassword= # # HSQLDB to file # #isis.persistor.datanucleus.impl.javax.jdo.option.ConnectionDriverName=org.hsqldb.jdbcDriver #isis.persistor.datanucleus.impl.javax.jdo.option.ConnectionURL=jdbc:hsqldb:file:/tmp/isis-simple-app/hsql-db;hsqldb.write_delay=false;shutdown=true #isis.persistor.datanucleus.impl.javax.jdo.option.ConnectionUserName=sa #isis.persistor.datanucleus.impl.javax.jdo.option.ConnectionPassword= # # HSQLDB to file (using log4jdbc-remix) # #isis.persistor.datanucleus.impl.javax.jdo.option.ConnectionDriverName=net.sf.log4jdbc.DriverSpy #isis.persistor.datanucleus.impl.javax.jdo.option.ConnectionURL=jdbc:log4jdbc:hsqldb:file:/tmp/isis-simple-app/hsql-db;hsqldb.write_delay=false;shutdown=true #isis.persistor.datanucleus.impl.javax.jdo.option.ConnectionUserName=sa #isis.persistor.datanucleus.impl.javax.jdo.option.ConnectionPassword= # # PostgreSQL Server # #isis.persistor.datanucleus.impl.javax.jdo.option.ConnectionDriverName=org.postgresql.Driver #isis.persistor.datanucleus.impl.javax.jdo.option.ConnectionURL=jdbc:postgresql://localhost:5432/isis #isis.persistor.datanucleus.impl.javax.jdo.option.ConnectionUserName=isis #isis.persistor.datanucleus.impl.javax.jdo.option.ConnectionPassword=isis # # PostgreSQL Server (using log4jdbc-remix) # #isis.persistor.datanucleus.impl.javax.jdo.option.ConnectionDriverName=net.sf.log4jdbc.DriverSpy #isis.persistor.datanucleus.impl.javax.jdo.option.ConnectionURL=jdbc:log4jdbc:postgresql://localhost:5432/isis #isis.persistor.datanucleus.impl.javax.jdo.option.ConnectionUserName=isis #isis.persistor.datanucleus.impl.javax.jdo.option.ConnectionPassword=isis # # MS SQL Server # #isis.persistor.datanucleus.impl.javax.jdo.option.ConnectionDriverName=com.microsoft.sqlserver.jdbc.SQLServerDriver #isis.persistor.datanucleus.impl.javax.jdo.option.ConnectionURL=jdbc:sqlserver://127.0.0.1:1433;instance=.;databaseName=simple #isis.persistor.datanucleus.impl.javax.jdo.option.ConnectionUserName=sa #isis.persistor.datanucleus.impl.javax.jdo.option.ConnectionPassword=p4ssword # # MS SQL Server (using log4jdbc-remix) # #isis.persistor.datanucleus.impl.javax.jdo.option.ConnectionDriverName=net.sf.log4jdbc.DriverSpy #isis.persistor.datanucleus.impl.javax.jdo.option.ConnectionURL=jdbc:log4jdbc:sqlserver://127.0.0.1:1433;instance=SQLEXPRESS;databaseName=jdo #isis.persistor.datanucleus.impl.javax.jdo.option.ConnectionUserName=jdo #isis.persistor.datanucleus.impl.javax.jdo.option.ConnectionPassword=jdopass # # neo4j # (experimental; run with -P neo4j profile in webapp project) # #isis.persistor.datanucleus.impl.javax.jdo.option.ConnectionURL=neo4j:neo4j_DB persistor_datanucleus.properties000066400000000000000000000062641264154357600342640ustar00rootroot00000000000000java-design-patterns-1.9.0/naked-objects/webapp/src/main/webapp/WEB-INF# Licensed to the Apache Software Foundation (ASF) under one # or more contributor license agreements. See the NOTICE file # distributed with this work for additional information # regarding copyright ownership. The ASF licenses this file # to you under the Apache License, Version 2.0 (the # "License"); you may not use this file except in compliance # with the License. You may obtain a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, # software distributed under the License is distributed on an # "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY # KIND, either express or implied. See the License for the # specific language governing permissions and limitations # under the License. # # configuration file for the JDO/DataNucleus objectstore # # identifies @PersistenceCapable entities to be eagerly registered # if move class to other package (eg com.mycompany.myapp.dom) then update isis.persistor.datanucleus.RegisterEntities.packagePrefix=domainapp.dom.modules # # hook to perform additional initialization when JDO class metadata is loaded # default implementation will attempt to run 'create schema' for the specified schema. # #isis.persistor.datanucleus.classMetadataLoadedListener=org.apache.isis.objectstore.jdo.datanucleus.CreateSchemaFromClassMetadata # whether to persist the event data as a "clob" or as a "zipped" byte[] # default is "zipped" #isis.persistor.datanucleus.PublishingService.serializedForm=zipped ##################################################################### # # DataNucleus' configuration # # The 'isis.persistor.datanucleus.impl' prefix is stripped off, # remainder is passed through to DataNucleus # ##################################################################### isis.persistor.datanucleus.impl.datanucleus.schema.autoCreateAll=true isis.persistor.datanucleus.impl.datanucleus.schema.validateTables=true isis.persistor.datanucleus.impl.datanucleus.schema.validateConstraints=true # # Require explicit persistence (since entities are Comparable and using ObjectContracts#compareTo). # see http://www.datanucleus.org/products/accessplatform_3_0/jdo/transaction_types.html # isis.persistor.datanucleus.impl.datanucleus.persistenceByReachabilityAtCommit=false # # How column names are identified # (http://www.datanucleus.org/products/datanucleus/jdo/orm/datastore_identifiers.html) # isis.persistor.datanucleus.impl.datanucleus.identifier.case=MixedCase # # L2 cache # off except if explicitly marked as cacheable # http://www.datanucleus.org/products/datanucleus/jdo/cache.html # isis.persistor.datanucleus.impl.datanucleus.cache.level2.type=none isis.persistor.datanucleus.impl.datanucleus.cache.level2.mode=ENABLE_SELECTIVE # # uncomment to use JNDI rather than direct JDBC # #isis.persistor.datanucleus.impl.datanucleus.ConnectionFactoryName=java:comp/env/jdbc/quickstart # # uncomment to use JTA resource # #isis.persistor.datanucleus.impl.datanucleus.ConnectionFactory2Name=java:comp/env/jdbc/quickstart-nontx #isis.persistor.datanucleus.impl.javax.jdo.option.TransactionType=JTA # # # JDBC connection details # ... are in persistor.properties # # java-design-patterns-1.9.0/naked-objects/webapp/src/main/webapp/WEB-INF/shiro.ini000066400000000000000000000061051264154357600274220ustar00rootroot00000000000000# # Licensed to the Apache Software Foundation (ASF) under one # or more contributor license agreements. See the NOTICE file # distributed with this work for additional information # regarding copyright ownership. The ASF licenses this file # to you under the Apache License, Version 2.0 (the # "License"); you may not use this file except in compliance # with the License. You may obtain a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, # software distributed under the License is distributed on an # "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY # KIND, either express or implied. See the License for the # specific language governing permissions and limitations # under the License. # [main] contextFactory = org.apache.isis.security.shiro.IsisLdapContextFactory contextFactory.url = ldap://localhost:10389 contextFactory.authenticationMechanism = CRAM-MD5 contextFactory.systemAuthenticationMechanism = simple contextFactory.systemUsername = uid=admin,ou=system contextFactory.systemPassword = secret ldapRealm = org.apache.isis.security.shiro.IsisLdapRealm ldapRealm.contextFactory = $contextFactory ldapRealm.searchBase = ou=groups,o=mojo ldapRealm.groupObjectClass = groupOfUniqueNames ldapRealm.uniqueMemberAttribute = uniqueMember ldapRealm.uniqueMemberAttributeValueTemplate = uid={0} # optional mapping from physical groups to logical application roles #ldapRealm.rolesByGroup = \ # LDN_USERS: user_role,\ # NYK_USERS: user_role,\ # HKG_USERS: user_role,\ # GLOBAL_ADMIN: admin_role,\ # DEMOS: self-install_role ldapRealm.permissionsByRole=\ user_role = *:ToDoItemsJdo:*:*,\ *:ToDoItem:*:*; \ self-install_role = *:ToDoItemsFixturesService:install:* ; \ admin_role = * # to use ldap... # (see docs for details of how to setup users/groups in Apache Directory Studio). #securityManager.realms = $ldapRealm # to use .ini file securityManager.realms = $iniRealm # ----------------------------------------------------------------------------- # Users and their assigned roles # # Each line conforms to the format defined in the # org.apache.shiro.realm.text.TextConfigurationRealm#setUserDefinitions JavaDoc # ----------------------------------------------------------------------------- [users] # user = password, role1, role2, role3, ... sven = pass, admin_role dick = pass, user_role, self-install_role bob = pass, user_role, self-install_role joe = pass, user_role, self-install_role guest = guest, user_role # ----------------------------------------------------------------------------- # Roles with assigned permissions # # Each line conforms to the format defined in the # org.apache.shiro.realm.text.TextConfigurationRealm#setRoleDefinitions JavaDoc # ----------------------------------------------------------------------------- [roles] # role = perm1, perm2, perm3, ... # perm in format: packageName:className:memberName:r,w user_role = *:SimpleObjects:*:*,\ *:SimpleObject:*:* self-install_role = *:DomainAppFixtureService:*:* admin_role = * java-design-patterns-1.9.0/naked-objects/webapp/src/main/webapp/WEB-INF/translations-en.po000066400000000000000000000135351264154357600312630ustar00rootroot00000000000000############################################################################## # # .pot file # # Translate this file to each required language and place in WEB-INF, eg: # # /WEB-INF/translations-en_US.po # /WEB-INF/translations-en.po # /WEB-INF/translations-fr_FR.po # /WEB-INF/translations-fr.po # /WEB-INF/translations.po # # If the app uses TranslatableString (eg for internationalized validation # messages), or if the app calls the TranslationService directly, then ensure # that all text to be translated has been captured by running a full # integration test suite that exercises all relevant behaviour # ############################################################################## #: org.apache.isis.core.runtime.services.i18n.po.TranslationServicePoMenu#downloadTranslations(java.lang.String) msgid ".pot file name" msgstr ".pot file name" #: org.apache.isis.core.runtime.services.i18n.po.TranslationServicePoMenu#resetTranslationCache() msgid "Clear translation cache" msgstr "Clear translation cache" #: domainapp.dom.modules.simple.SimpleObjects#create() msgid "Create" msgstr "Create" #: org.apache.isis.applib.fixturescripts.FixtureScript#discoverable msgid "Discoverable" msgstr "Discoverable" #: org.apache.isis.applib.fixtures.FixtureType#DOMAIN_OBJECTS msgid "Domain Objects" msgstr "Domain Objects" #: org.apache.isis.core.runtime.services.i18n.po.TranslationServicePoMenu#downloadTranslations() msgid "Download Translations" msgstr "Download Translations" #: domainapp.dom.modules.simple.SimpleObject#updateName() msgid "Exclamation mark is not allowed" msgstr "Exclamation mark is not allowed" #: domainapp.dom.modules.simple.SimpleObjects#findByName() msgid "Find By Name" msgstr "Find By Name" #: org.apache.isis.applib.fixturescripts.FixtureResult#fixtureScriptClassName msgid "Fixture script" msgstr "Fixture script" #: org.apache.isis.applib.fixturescripts.FixtureScript#friendlyName msgid "Friendly Name" msgstr "Friendly Name" #: domainapp.dom.modules.simple.SimpleObject msgid "General" msgstr "General" #: domainapp.dom.app.homepage.HomePageService#homePage() msgid "Home Page" msgstr "Home Page" #: domainapp.dom.modules.simple.SimpleObjects#listAll() msgid "List All" msgstr "List All" #: org.apache.isis.applib.fixturescripts.FixtureScript#localName msgid "Local Name" msgstr "Local Name" #: org.apache.isis.applib.fixturescripts.FixtureScript#lookup() #: org.apache.isis.applib.services.bookmark.BookmarkHolderActionContributions#lookup() msgid "Lookup" msgstr "Lookup" #: domainapp.dom.modules.simple.SimpleObject#name #: domainapp.dom.modules.simple.SimpleObjects#create(java.lang.String) #: domainapp.dom.modules.simple.SimpleObjects#findByName(java.lang.String) msgid "Name" msgstr "Name" #: domainapp.dom.modules.simple.SimpleObject#updateName(java.lang.String) msgid "New name" msgstr "New name" #: org.apache.isis.applib.services.bookmark.BookmarkHolderAssociationContributions#object() msgid "Object" msgstr "Object" #: domainapp.dom.modules.simple.SimpleObject#title() msgid "Object: {name}" msgstr "Object: {name}" #: domainapp.dom.app.homepage.HomePageViewModel#objects msgid "Objects" msgstr "Objects" #: org.apache.isis.applib.fixtures.FixtureType#OTHER msgid "Other" msgstr "Other" #: domainapp.fixture.DomainAppFixturesService#runFixtureScript(org.apache.isis.applib.fixturescripts.FixtureScript,java.lang.String) #: org.apache.isis.applib.fixturescripts.FixtureScripts#runFixtureScript(org.apache.isis.applib.fixturescripts.FixtureScript,java.lang.String) msgid "Parameters" msgstr "Parameters" #: domainapp.fixture.DomainAppFixturesService #: org.apache.isis.core.runtime.services.i18n.po.TranslationServicePoMenu msgid "Prototyping" msgstr "Prototyping" #: domainapp.fixture.DomainAppFixturesService#recreateObjectsAndReturnFirst() msgid "Recreate Objects And Return First" msgstr "Recreate Objects And Return First" #: org.apache.isis.applib.fixturescripts.FixtureResult#object msgid "Result" msgstr "Result" #: org.apache.isis.applib.fixturescripts.FixtureResult#className msgid "Result class" msgstr "Result class" #: org.apache.isis.applib.fixturescripts.FixtureResult#key msgid "Result key" msgstr "Result key" #: domainapp.fixture.DomainAppFixturesService#runFixtureScript() #: org.apache.isis.applib.fixturescripts.FixtureScripts#runFixtureScript() msgid "Run Fixture Script" msgstr "Run Fixture Script" #: org.apache.isis.applib.fixturescripts.FixtureScript msgid "Script" msgstr "Script" #: domainapp.fixture.DomainAppFixturesService#runFixtureScript(org.apache.isis.applib.fixturescripts.FixtureScript,java.lang.String) #: org.apache.isis.applib.fixturescripts.FixtureScripts#runFixtureScript(org.apache.isis.applib.fixturescripts.FixtureScript,java.lang.String) msgid "Script-specific parameters (if any). The format depends on the script implementation (eg key=value, CSV, JSON, XML etc)" msgstr "Script-specific parameters (if any). The format depends on the script implementation (eg key=value, CSV, JSON, XML etc)" #: domainapp.dom.modules.simple.SimpleObjects#title() msgid "Simple Objects" msgstr "Simple Objects" #: org.apache.isis.core.runtime.services.i18n.po.TranslationServicePoMenu#switchToReadingTranslations() msgid "Switch To Reading Translations" msgstr "Switch To Reading Translations" #: org.apache.isis.core.runtime.services.i18n.po.TranslationServicePoMenu#switchToWritingTranslations() msgid "Switch To Writing Translations" msgstr "Switch To Writing Translations" #: org.apache.isis.applib.fixturescripts.FixtureScript#type msgid "Type" msgstr "Type" #: domainapp.dom.modules.simple.SimpleObject#updateName() msgid "Update Name" msgstr "Update Name" #: domainapp.dom.modules.simple.SimpleObject msgid "name" msgstr "" ############################################################################## # end of .pot file ############################################################################## java-design-patterns-1.9.0/naked-objects/webapp/src/main/webapp/WEB-INF/translations-es.po000066400000000000000000000136311264154357600312650ustar00rootroot00000000000000############################################################################## # # .pot file # # Translate this file to each required language and place in WEB-INF, eg: # # /WEB-INF/translations-en_US.po # /WEB-INF/translations-en.po # /WEB-INF/translations-fr_FR.po # /WEB-INF/translations-fr.po # /WEB-INF/translations.po # # If the app uses TranslatableString (eg for internationalized validation # messages), or if the app calls the TranslationService directly, then ensure # that all text to be translated has been captured by running a full # integration test suite that exercises all relevant behaviour # ############################################################################## #: org.apache.isis.core.runtime.services.i18n.po.TranslationServicePoMenu#downloadTranslations(java.lang.String) msgid ".pot file name" msgstr "fichero .pot" #: org.apache.isis.core.runtime.services.i18n.po.TranslationServicePoMenu#resetTranslationCache() msgid "Clear translation cache" msgstr "Limpiar la caché de traducciones" #: domainapp.dom.modules.simple.SimpleObjects#create() msgid "Create" msgstr "Crear" #: org.apache.isis.applib.fixturescripts.FixtureScript#discoverable msgid "Discoverable" msgstr "Descubrible" #: org.apache.isis.applib.fixtures.FixtureType#DOMAIN_OBJECTS msgid "Domain Objects" msgstr "Domain Objects" #: org.apache.isis.core.runtime.services.i18n.po.TranslationServicePoMenu#downloadTranslations() msgid "Download Translations" msgstr "Descargar traducciones" #: domainapp.dom.modules.simple.SimpleObject#updateName() msgid "Exclamation mark is not allowed" msgstr "No se admite el signo de exclamación" #: domainapp.dom.modules.simple.SimpleObjects#findByName() msgid "Find By Name" msgstr "Buscar por Nombre" #: org.apache.isis.applib.fixturescripts.FixtureResult#fixtureScriptClassName msgid "Fixture script" msgstr "Script de Instalación" #: org.apache.isis.applib.fixturescripts.FixtureScript#friendlyName msgid "Friendly Name" msgstr "Nombre común" #: domainapp.dom.app.homepage.HomePageService#homePage() msgid "Home Page" msgstr "Página de Inicio" #: domainapp.dom.modules.simple.SimpleObjects#listAll() msgid "List All" msgstr "Listar Todos" #: org.apache.isis.applib.fixturescripts.FixtureScript#localName msgid "Local Name" msgstr "Nombre Local" #: org.apache.isis.applib.fixturescripts.FixtureScript#lookup() #: org.apache.isis.applib.services.bookmark.BookmarkHolderActionContributions#lookup() msgid "Lookup" msgstr "Buscar" #: domainapp.dom.modules.simple.SimpleObject#name #: domainapp.dom.modules.simple.SimpleObjects#create(java.lang.String) #: domainapp.dom.modules.simple.SimpleObjects#findByName(java.lang.String) msgid "Name" msgstr "Nombre" #: domainapp.dom.modules.simple.SimpleObject#updateName(java.lang.String) msgid "New name" msgstr "Nuevo nombre" #: org.apache.isis.applib.services.bookmark.BookmarkHolderAssociationContributions#object() msgid "Object" msgstr "Objeto" #: domainapp.dom.modules.simple.SimpleObject#title() msgid "Object: {name}" msgstr "Objeto: {name}" #: domainapp.dom.app.homepage.HomePageViewModel#objects msgid "Objects" msgstr "Objetos" #: org.apache.isis.applib.fixtures.FixtureType#OTHER msgid "Other" msgstr "Other" #: domainapp.fixture.DomainAppFixturesService#runFixtureScript(org.apache.isis.applib.fixturescripts.FixtureScript,java.lang.String) #: org.apache.isis.applib.fixturescripts.FixtureScripts#runFixtureScript(org.apache.isis.applib.fixturescripts.FixtureScript,java.lang.String) msgid "Parameters" msgstr "Parámetros" #: domainapp.fixture.DomainAppFixturesService #: org.apache.isis.core.runtime.services.i18n.po.TranslationServicePoMenu msgid "Prototyping" msgstr "Prototipo" #: domainapp.fixture.DomainAppFixturesService#recreateObjectsAndReturnFirst() msgid "Recreate Objects And Return First" msgstr "Recrear Objetos y Devolver el Primero" #: org.apache.isis.applib.fixturescripts.FixtureResult#object msgid "Result" msgstr "Resultado" #: org.apache.isis.applib.fixturescripts.FixtureResult#className msgid "Result class" msgstr "Clase del resultado" #: org.apache.isis.applib.fixturescripts.FixtureResult#key msgid "Result key" msgstr "Clave del Resultado" #: domainapp.fixture.DomainAppFixturesService#runFixtureScript() #: org.apache.isis.applib.fixturescripts.FixtureScripts#runFixtureScript() msgid "Run Fixture Script" msgstr "Ejecutar Script de Instalación" #: org.apache.isis.applib.fixturescripts.FixtureScript msgid "Script" msgstr "Script" #: domainapp.fixture.DomainAppFixturesService#runFixtureScript(org.apache.isis.applib.fixturescripts.FixtureScript,java.lang.String) #: org.apache.isis.applib.fixturescripts.FixtureScripts#runFixtureScript(org.apache.isis.applib.fixturescripts.FixtureScript,java.lang.String) msgid "Script-specific parameters (if any). The format depends on the script implementation (eg key=value, CSV, JSON, XML etc)" msgstr "Parámetros específicos del Script (si hay alguno). El formato depende de la implementación del script (por ejemplo, clave=valor, CSV, JSON, XML, etc.)" #: domainapp.dom.modules.simple.SimpleObjects#title() msgid "Simple Objects" msgstr "Objetos básicos" #: org.apache.isis.core.runtime.services.i18n.po.TranslationServicePoMenu#switchToReadingTranslations() msgid "Switch To Reading Translations" msgstr "Cambiar a Lectura de Traducciones" #: org.apache.isis.core.runtime.services.i18n.po.TranslationServicePoMenu#switchToWritingTranslations() msgid "Switch To Writing Translations" msgstr "Cambiar a Escritura de Traducciones" #: org.apache.isis.applib.fixturescripts.FixtureScript#type msgid "Type" msgstr "Tipo" #: domainapp.dom.modules.simple.SimpleObject#updateName() msgid "Update Name" msgstr "Nombre de la Actualización" #: domainapp.dom.modules.simple.SimpleObject msgid "name" msgstr "" ############################################################################## # end of .pot file ############################################################################## java-design-patterns-1.9.0/naked-objects/webapp/src/main/webapp/WEB-INF/translations-nl.po000066400000000000000000000125271264154357600312720ustar00rootroot00000000000000############################################################################## # # .pot file # # Translate this file to each required language and place in WEB-INF, eg: # # /WEB-INF/translations-en_US.po # /WEB-INF/translations-en.po # /WEB-INF/translations-fr_FR.po # /WEB-INF/translations-fr.po # /WEB-INF/translations.po # # If the app uses TranslatableString (eg for internationalized validation # messages), or if the app calls the TranslationService directly, then ensure # that all text to be translated has been captured by running a full # integration test suite that exercises all relevant behaviour # ############################################################################## #: org.apache.isis.core.runtime.services.i18n.po.TranslationServicePoMenu#downloadTranslations(java.lang.String) msgid ".pot file name" msgstr "" #: org.apache.isis.core.runtime.services.i18n.po.TranslationServicePoMenu#resetTranslationCache() msgid "Clear translation cache" msgstr "" #: domainapp.dom.modules.simple.SimpleObjects#create() msgid "Create" msgstr "Creëren" #: org.apache.isis.applib.fixturescripts.FixtureScript#discoverable msgid "Discoverable" msgstr "Discoverable" #: org.apache.isis.applib.fixtures.FixtureType#DOMAIN_OBJECTS msgid "Domain Objects" msgstr "Domain Objects" #: org.apache.isis.core.runtime.services.i18n.po.TranslationServicePoMenu#downloadTranslations() msgid "Download Translations" msgstr "" #: domainapp.dom.modules.simple.SimpleObject#updateName() msgid "Exclamation mark is not allowed" msgstr "" #: domainapp.dom.modules.simple.SimpleObjects#findByName() msgid "Find By Name" msgstr "Zoek op Naam" #: org.apache.isis.applib.fixturescripts.FixtureResult#fixtureScriptClassName msgid "Fixture script" msgstr "" #: org.apache.isis.applib.fixturescripts.FixtureScript#friendlyName msgid "Friendly Name" msgstr "" #: domainapp.dom.app.homepage.HomePageService#homePage() msgid "Home Page" msgstr "" #: domainapp.dom.modules.simple.SimpleObjects#listAll() msgid "List All" msgstr "Lijst Alle" #: org.apache.isis.applib.fixturescripts.FixtureScript#localName msgid "Local Name" msgstr "" #: org.apache.isis.applib.fixturescripts.FixtureScript#lookup() #: org.apache.isis.applib.services.bookmark.BookmarkHolderActionContributions#lookup() msgid "Lookup" msgstr "" #: domainapp.dom.modules.simple.SimpleObject#name #: domainapp.dom.modules.simple.SimpleObjects#create(java.lang.String) #: domainapp.dom.modules.simple.SimpleObjects#findByName(java.lang.String) msgid "Name" msgstr "Naam" #: domainapp.dom.modules.simple.SimpleObject#updateName(java.lang.String) msgid "New name" msgstr "Nieuwe naam" #: org.apache.isis.applib.services.bookmark.BookmarkHolderAssociationContributions#object() msgid "Object" msgstr "" #: domainapp.dom.modules.simple.SimpleObject#title() msgid "Object: {name}" msgstr "" #: domainapp.dom.app.homepage.HomePageViewModel#objects msgid "Objects" msgstr "Objects" #: org.apache.isis.applib.fixtures.FixtureType#OTHER msgid "Other" msgstr "Other" #: domainapp.fixture.DomainAppFixturesService#runFixtureScript(org.apache.isis.applib.fixturescripts.FixtureScript,java.lang.String) #: org.apache.isis.applib.fixturescripts.FixtureScripts#runFixtureScript(org.apache.isis.applib.fixturescripts.FixtureScript,java.lang.String) msgid "Parameters" msgstr "" #: domainapp.fixture.DomainAppFixturesService #: org.apache.isis.core.runtime.services.i18n.po.TranslationServicePoMenu msgid "Prototyping" msgstr "" #: domainapp.fixture.DomainAppFixturesService#recreateObjectsAndReturnFirst() msgid "Recreate Objects And Return First" msgstr "" #: org.apache.isis.applib.fixturescripts.FixtureResult#object msgid "Result" msgstr "" #: org.apache.isis.applib.fixturescripts.FixtureResult#className msgid "Result class" msgstr "" #: org.apache.isis.applib.fixturescripts.FixtureResult#key msgid "Result key" msgstr "" #: domainapp.fixture.DomainAppFixturesService#runFixtureScript() #: org.apache.isis.applib.fixturescripts.FixtureScripts#runFixtureScript() msgid "Run Fixture Script" msgstr "" #: org.apache.isis.applib.fixturescripts.FixtureScript msgid "Script" msgstr "" #: domainapp.fixture.DomainAppFixturesService#runFixtureScript(org.apache.isis.applib.fixturescripts.FixtureScript,java.lang.String) #: org.apache.isis.applib.fixturescripts.FixtureScripts#runFixtureScript(org.apache.isis.applib.fixturescripts.FixtureScript,java.lang.String) msgid "Script-specific parameters (if any). The format depends on the script implementation (eg key=value, CSV, JSON, XML etc)" msgstr "" #: domainapp.dom.modules.simple.SimpleObjects#title() msgid "Simple Objects" msgstr "Eenvoudige Objecten" #: org.apache.isis.core.runtime.services.i18n.po.TranslationServicePoMenu#switchToReadingTranslations() msgid "Switch To Reading Translations" msgstr "" #: org.apache.isis.core.runtime.services.i18n.po.TranslationServicePoMenu#switchToWritingTranslations() msgid "Switch To Writing Translations" msgstr "" #: org.apache.isis.applib.fixturescripts.FixtureScript#type msgid "Type" msgstr "" #: domainapp.dom.modules.simple.SimpleObject#updateName() msgid "Update Name" msgstr "Updaten Naam" #: domainapp.dom.modules.simple.SimpleObject msgid "name" msgstr "" ############################################################################## # end of .pot file ############################################################################## java-design-patterns-1.9.0/naked-objects/webapp/src/main/webapp/WEB-INF/translations.po000066400000000000000000000124641264154357600306630ustar00rootroot00000000000000############################################################################## # # .pot file # # Translate this file to each required language and place in WEB-INF, eg: # # /WEB-INF/translations-en_US.po # /WEB-INF/translations-en.po # /WEB-INF/translations-fr_FR.po # /WEB-INF/translations-fr.po # /WEB-INF/translations.po # # If the app uses TranslatableString (eg for internationalized validation # messages), or if the app calls the TranslationService directly, then ensure # that all text to be translated has been captured by running a full # integration test suite that exercises all relevant behaviour # ############################################################################## #: org.apache.isis.core.runtime.services.i18n.po.TranslationServicePoMenu#downloadTranslations(java.lang.String) msgid ".pot file name" msgstr "" #: org.apache.isis.core.runtime.services.i18n.po.TranslationServicePoMenu#resetTranslationCache() msgid "Clear translation cache" msgstr "" #: domainapp.dom.modules.simple.SimpleObjects#create() msgid "Create" msgstr "" #: org.apache.isis.applib.fixturescripts.FixtureScript#discoverable msgid "Discoverable" msgstr "" #: org.apache.isis.applib.fixtures.FixtureType#DOMAIN_OBJECTS msgid "Domain Objects" msgstr "" #: org.apache.isis.core.runtime.services.i18n.po.TranslationServicePoMenu#downloadTranslations() msgid "Download Translations" msgstr "" #: domainapp.dom.modules.simple.SimpleObject#updateName() msgid "Exclamation mark is not allowed" msgstr "" #: domainapp.dom.modules.simple.SimpleObjects#findByName() msgid "Find By Name" msgstr "" #: org.apache.isis.applib.fixturescripts.FixtureResult#fixtureScriptClassName msgid "Fixture script" msgstr "" #: org.apache.isis.applib.fixturescripts.FixtureScript#friendlyName msgid "Friendly Name" msgstr "" #: domainapp.dom.modules.simple.SimpleObject msgid "General" msgstr "Common" #: domainapp.dom.app.homepage.HomePageService#homePage() msgid "Home Page" msgstr "" #: domainapp.dom.modules.simple.SimpleObjects#listAll() msgid "List All" msgstr "" #: org.apache.isis.applib.fixturescripts.FixtureScript#localName msgid "Local Name" msgstr "" #: org.apache.isis.applib.fixturescripts.FixtureScript#lookup() #: org.apache.isis.applib.services.bookmark.BookmarkHolderActionContributions#lookup() msgid "Lookup" msgstr "" #: domainapp.dom.modules.simple.SimpleObject#name #: domainapp.dom.modules.simple.SimpleObjects#create(java.lang.String) #: domainapp.dom.modules.simple.SimpleObjects#findByName(java.lang.String) msgid "Name" msgstr "" #: domainapp.dom.modules.simple.SimpleObject#updateName(java.lang.String) msgid "New name" msgstr "" #: org.apache.isis.applib.services.bookmark.BookmarkHolderAssociationContributions#object() msgid "Object" msgstr "" #: domainapp.dom.modules.simple.SimpleObject#title() msgid "Object: {name}" msgstr "" #: domainapp.dom.app.homepage.HomePageViewModel#objects msgid "Objects" msgstr "" #: org.apache.isis.applib.fixtures.FixtureType#OTHER msgid "Other" msgstr "" #: domainapp.fixture.DomainAppFixturesService#runFixtureScript(org.apache.isis.applib.fixturescripts.FixtureScript,java.lang.String) #: org.apache.isis.applib.fixturescripts.FixtureScripts#runFixtureScript(org.apache.isis.applib.fixturescripts.FixtureScript,java.lang.String) msgid "Parameters" msgstr "" #: domainapp.fixture.DomainAppFixturesService #: org.apache.isis.core.runtime.services.i18n.po.TranslationServicePoMenu msgid "Prototyping" msgstr "" #: domainapp.fixture.DomainAppFixturesService#recreateObjectsAndReturnFirst() msgid "Recreate Objects And Return First" msgstr "" #: org.apache.isis.applib.fixturescripts.FixtureResult#object msgid "Result" msgstr "" #: org.apache.isis.applib.fixturescripts.FixtureResult#className msgid "Result class" msgstr "" #: org.apache.isis.applib.fixturescripts.FixtureResult#key msgid "Result key" msgstr "" #: domainapp.fixture.DomainAppFixturesService#runFixtureScript() #: org.apache.isis.applib.fixturescripts.FixtureScripts#runFixtureScript() msgid "Run Fixture Script" msgstr "" #: org.apache.isis.applib.fixturescripts.FixtureScript msgid "Script" msgstr "" #: domainapp.fixture.DomainAppFixturesService#runFixtureScript(org.apache.isis.applib.fixturescripts.FixtureScript,java.lang.String) #: org.apache.isis.applib.fixturescripts.FixtureScripts#runFixtureScript(org.apache.isis.applib.fixturescripts.FixtureScript,java.lang.String) msgid "Script-specific parameters (if any). The format depends on the script implementation (eg key=value, CSV, JSON, XML etc)" msgstr "" #: domainapp.dom.modules.simple.SimpleObjects#title() msgid "Simple Objects" msgstr "" #: org.apache.isis.core.runtime.services.i18n.po.TranslationServicePoMenu#switchToReadingTranslations() msgid "Switch To Reading Translations" msgstr "" #: org.apache.isis.core.runtime.services.i18n.po.TranslationServicePoMenu#switchToWritingTranslations() msgid "Switch To Writing Translations" msgstr "" #: org.apache.isis.applib.fixturescripts.FixtureScript#type msgid "Type" msgstr "" #: domainapp.dom.modules.simple.SimpleObject#updateName() msgid "Update Name" msgstr "" #: domainapp.dom.modules.simple.SimpleObject msgid "name" msgstr "" ############################################################################## # end of .pot file ############################################################################## viewer_restfulobjects.properties000066400000000000000000000054701264154357600342570ustar00rootroot00000000000000java-design-patterns-1.9.0/naked-objects/webapp/src/main/webapp/WEB-INF# Licensed to the Apache Software Foundation (ASF) under one # or more contributor license agreements. See the NOTICE file # distributed with this work for additional information # regarding copyright ownership. The ASF licenses this file # to you under the Apache License, Version 2.0 (the # "License"); you may not use this file except in compliance # with the License. You may obtain a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, # software distributed under the License is distributed on an # "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY # KIND, either express or implied. See the License for the # specific language governing permissions and limitations # under the License. # # configuration file for the Restful Objects viewer # # the baseUrl for hrefs in the events generated by the RO EventSerializer isis.viewer.restfulobjects.RestfulObjectsSpecEventSerializer.baseUrl=http://localhost:8080/restful/ # renders param details in the (incorrect) form that they were for GSOC2013 viewers # isis.viewer.restfulobjects.gsoc2013.legacyParamDetails=true # whether to honor UI hints, in particular Render(EAGERLY). Defaults to false. #isis.viewer.restfulobjects.honorUiHints=false ############################################################################### # Non-standard configuration settings. # # If enabled of the following are enabled then the viewer is deviating from the # RO spec standard; compatibility may be compromised with RO clients. ############################################################################### # whether to show only object properties for object members # (on the object representation only) # Takes precedence over the other 'suppress' below. #isis.viewer.restfulobjects.objectPropertyValuesOnly=true # whether to suppress "describedby" links. Defaults to false. #isis.viewer.restfulobjects.suppressDescribedByLinks=true # whether to suppress "update" links. Defaults to false. #isis.viewer.restfulobjects.suppressUpdateLink=true # whether to suppress "id" json-prop for object members. Defaults to false. #isis.viewer.restfulobjects.suppressMemberId=true # whether to suppress "links" json-prop for object members # (on the object representation only). Defaults to false. #isis.viewer.restfulobjects.suppressMemberLinks=true # whether to suppress "extensions" json-prop for object members # (on the object representation only). Defaults to false. #isis.viewer.restfulobjects.suppressMemberExtensions=true # whether to suppress "disabledReason" json-prop for object members # (on the object representation only). Defaults to false. #isis.viewer.restfulobjects.suppressMemberDisabledReason=true ############################################################################### java-design-patterns-1.9.0/naked-objects/webapp/src/main/webapp/WEB-INF/viewer_wicket.properties000066400000000000000000000056151264154357600325670ustar00rootroot00000000000000# Licensed to the Apache Software Foundation (ASF) under one # or more contributor license agreements. See the NOTICE file # distributed with this work for additional information # regarding copyright ownership. The ASF licenses this file # to you under the Apache License, Version 2.0 (the # "License"); you may not use this file except in compliance # with the License. You may obtain a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, # software distributed under the License is distributed on an # "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY # KIND, either express or implied. See the License for the # specific language governing permissions and limitations # under the License. # # configuration file for the Wicket viewer # # # The maximum length of titles to display in standalone or parented tables. # Titles longer than this length will be truncated with trailing ellipses (...) # # For example, if set to 12, the title # "Buy milk on 15-Feb-13" will be truncated to "Buy milk ..." # # If set to 0, then only the icon will be shown. # isis.viewer.wicket.maxTitleLengthInStandaloneTables=0 isis.viewer.wicket.maxTitleLengthInParentedTables=0 #isis.viewer.wicket.datePattern=dd-MM-yyyy #isis.viewer.wicket.dateTimePattern=dd-MM-yyyy HH:mm #isis.viewer.wicket.datePickerPattern=DD-MM-YYYY #isis.viewer.wicket.datePattern=dd/MM/yy #isis.viewer.wicket.dateTimePattern=dd/MM/yy HH:mm #isis.viewer.wicket.datePickerPattern=DD/MM/YY # # whether to strip wicket tags from markup (default is true, as they may break some CSS rules) # #isis.viewer.wicket.stripWicketTags=false # # whether to suppress the 'rememberMe' checkbox on the login page (default is false) # #isis.viewer.wicket.suppressRememberMe=false # # if user attempts to access a protected URL before signing in, then as a convenience the viewer will continue # through to that destination after successful login. If you consider this to be a security risk then this flag # disables that behaviour (default is false). # #isis.viewer.wicket.clearOriginalDestination=true # # whether to show action dialogs on their own page rather than as a modal dialog (default is false) # #isis.viewer.wicket.disableModalDialogs=false # # the maximum number of pages to list in bookmark (default is 15) # #isis.viewer.wicket.bookmarkedPages.maxSize=15 # # whether to show the bootstrap theme chooser (defaults false) # #isis.viewer.wicket.themes.showChooser=false isis.viewer.wicket.themes.showChooser=true # # comma-separated list of themes to choose from (default is to show all themes from bootswatch.com). # #isis.viewer.wicket.themes.enabled=bootstrap-theme,Cosmo,Flatly,Darkly,Sandstone,United # # whether to automatically select dependent choice when the choice it depends upon changes. # #isis.viewer.wicket.disableDependentChoiceAutoSelection=falsejava-design-patterns-1.9.0/naked-objects/webapp/src/main/webapp/WEB-INF/web.xml000066400000000000000000000247001264154357600270750ustar00rootroot00000000000000 Simple app about/index.html org.apache.shiro.web.env.EnvironmentLoaderListener ShiroFilter org.apache.shiro.web.servlet.ShiroFilter ShiroFilter /* isis.viewers wicket,restfulobjects IsisLogOnExceptionFilter org.apache.isis.core.webapp.diagnostics.IsisLogOnExceptionFilter IsisLogOnExceptionFilter /wicket/* IsisLogOnExceptionFilter /restful/* ResourceCachingFilter org.apache.isis.core.webapp.content.ResourceCachingFilter CacheTime 86400 ResourceCachingFilter *.js ResourceCachingFilter *.css ResourceCachingFilter *.png ResourceCachingFilter *.jpg ResourceCachingFilter *.gif ResourceCachingFilter *.html ResourceCachingFilter *.swf Resource org.apache.isis.core.webapp.content.ResourceServlet Resource *.css Resource *.png Resource *.jpg Resource *.gif Resource *.js Resource *.html Resource *.swf WicketFilter org.apache.wicket.protocol.http.WicketFilter applicationClassName domainapp.webapp.SimpleApplication WicketFilter /wicket/* configuration development org.jboss.resteasy.plugins.server.servlet.ResteasyBootstrap javax.ws.rs.Application org.apache.isis.viewer.restfulobjects.server.RestfulObjectsApplication resteasy.servlet.mapping.prefix /restful/ IsisSessionFilterForRestfulObjects org.apache.isis.core.webapp.IsisSessionFilter authenticationSessionStrategy org.apache.isis.viewer.restfulobjects.server.authentication.AuthenticationSessionStrategyBasicAuth whenNoSession basicAuthChallenge IsisSessionFilterForRestfulObjects RestfulObjectsRestEasyDispatcher IsisTransactionFilterForRestfulObjects org.apache.isis.viewer.restfulobjects.server.webapp.IsisTransactionFilterForRestfulObjects IsisTransactionFilterForRestfulObjects RestfulObjectsRestEasyDispatcher RestfulObjectsRestEasyDispatcher org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher RestfulObjectsRestEasyDispatcher /restful/* java-design-patterns-1.9.0/naked-objects/webapp/src/main/webapp/about/000077500000000000000000000000001264154357600256565ustar00rootroot00000000000000java-design-patterns-1.9.0/naked-objects/webapp/src/main/webapp/about/images/000077500000000000000000000000001264154357600271235ustar00rootroot00000000000000java-design-patterns-1.9.0/naked-objects/webapp/src/main/webapp/about/images/isis-logo.png000066400000000000000000000335201264154357600315410ustar00rootroot00000000000000PNG  IHDRUgsRGBgAMA a pHYsodtEXtSoftwarePaint.NET v3.5.100r6IDATx^}|Gw}{{1dPql06L9LA"A@lD090&0ȶ#ZꙞa4ɥFS]UꅪB恖-Z +<4j2e@@@2 99999999999999999G9p_:uU]eVḿ{n4=ӟd)9?́<ʁZ~㻻5Yxp GUw[s@s@s 9p[ iʁ?$g?[ȳN yVu54BŁpB.|!PInGs@s r YGȔ% )hɳ";99*+ܾ}[oY*]beƖdC"@B%́<ˁp#JgINN?$J@@8*>/'E[sd%2s~ZH@D[ Nih W^)ۄH;3F̋!h:'۸rL_w 7oޔ9#`(#2@Ve,R ڝ{],kF47!A"-\n@Ƶ˕Fnz7>+vчޠcʅAޟXa}; H"Lgdbݳ7?b&lsJ(C֕œz;"(pta;ApN퉣<Xm?os h7KA [ 5lywQM,x(/We+˞n%ƖC#k2El|!9ٽ|?^>G ?$/N9#h+ 0L۵Z8Ȳu"60#? 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DنͥEߛ p|@ ի2|ul=_yYY[Ԭ%KjԐժɲUdy  X#ˡdG"x+C8XR,>"CbERe4*?I4yV&;8O\[,@ۻ{Zo#OR1 U9Ds>lp^\!\+a|2l@Mt6 TT\,@炃%qa_,Z*QP KØ:-^;QA*xPt-V|1XIJ #jVoP_ySUMPc7;g@\< G#OmHu7t<[t~[*1UL$TdTm2A7IMJƣ&ånҠ iب4i4iM:Yo/=_n-ok.6A/6/4aϼ,kՑ5QUkJ5dtyXǩq2&6^بPEȸ22LiI*SJK$P$ 1,qpt֖‰L0x Ѭv83x\Ot'$B߭]b3–L+{9fX6\ǂzhT+8W ?wۢ [uuѤsK[@ '(O^Lx?a.J7\O݌ E!.Hy5Q]1e9DZRee4EqqPL.],y4eD_-IL-c)񠸞J\m-]bl%zV"ۮ6+LeRejHJ5[(%ΓMfK&oK&3$4j> P@LX;_TgDa+e`kvW(ERGʕul4ͽ9Cke}Creٸu$]/ \),  K'er^)^I[{ &UmخH:$FAQIT5UnD].eZ/ "X %D%̑gIߖ⍦JW'K+x$)^MȐkG T>T\dp_7H ]OYu( !eǸ_A?m ><y @Bj?"~nOLaft̚g-ݛn&w朣KD{3;]e&ڬCZtKysQ恔7UN|]޾}[\"O| ivJbTi c &P$cA {[A'@v6 $]hL&]6I,*%VOtǵa h,QڦIdezD`ʴZ"eZ.K&/8>["u;  r-yΙ6i+'u ieX0.L0gq'i|gZܛ䤈-a 3K=v2!|ŗr27mtKZ%J|D_ W\3@ Ȼ&<@,X#N$ nvA[N iT"ZHD+Z$aQ}10Lʌ ' .pQ0~ӪU=Ipq̾,T;1⼹0zdJP(X5/͛K?2o4H*t\$[,6N3!0mE#GOևA9b3d=@Ĵ>L B0-!dZ!-J0ztyu2qQܺu+W$̉sPFP  ߿19*_d,tƏJ7zꁸїI&Lk *8E V-|]L>j wVK4]StU8A} p_aX V+X@Jn(X&uGzCwȱL (!SxU'%́i1Ϙ~|&06ȹl,+#о: p'et5.Uju'Kf &Lπ?ܹY=##i4\:$mwHDH[ @B<9́@-RN囤TiD5%%ߘo27)XdbyVL< 0au_AF{~ۤ2o$x8jT4l1B VEMc}tQ: fJ\ 4q p` ueɾʖ}u/xn>% +}yPZ);Ө[ = FX4us΁P5VgR+-KIn8,vd]e˾<;RύFߴ-Ґ}Du.-.9ā{SyhUt>_ju!%kӌM`ToBו}+%UǾ~2L T!jhU/YI)RT)h}u{q["MxZ(^`QyuFϽ@xje^W'@Nq /q\t8Be4y45Q?^41%8#U <J=6H2t|/7?c+<$'(n T /dR׫99G8_rsyN8q6C%IRIR _h W,aۤsCv=aWY2?g 44.%_W_Gd^:i, Apache Isis™ SimpleApp
Isis Logo

This app has been generated using Apache Isis' SimpleApp archetype, to create a purposefully minimal application that nevertheless includes fixture data, integration tests and BDD specs.

The app itself consists of a single domain class, SimpleObject, along with an equally simple (factory/repository) domain service, SimpleObjects.

To access the app:

  • wicket/

    provides accesses to a generic UI for end-users, Isis' Wicket Viewer. As its name suggests, this viewer is built on top of Apache Wicket™.

  • restful/

    provides access to a RESTful API conformant with the Restful Objects spec. This is part of Apache Isis Core. The implementation technology is JBoss RestEasy.

The default user/password is sven/pass (as configured in the shiro.ini file).

java-design-patterns-1.9.0/naked-objects/webapp/src/main/webapp/css/000077500000000000000000000000001264154357600253345ustar00rootroot00000000000000java-design-patterns-1.9.0/naked-objects/webapp/src/main/webapp/css/application.css000066400000000000000000000014731264154357600303560ustar00rootroot00000000000000/* * Licensed to the Apache Software Foundation (ASF) under one * or more contributor license agreements. See the NOTICE file * distributed with this work for additional information * regarding copyright ownership. The ASF licenses this file * to you under the Apache License, Version 2.0 (the * "License"); you may not use this file except in compliance * with the License. You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, * software distributed under the License is distributed on an * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY * KIND, either express or implied. See the License for the * specific language governing permissions and limitations * under the License. */ java-design-patterns-1.9.0/naked-objects/webapp/src/main/webapp/images/000077500000000000000000000000001264154357600260115ustar00rootroot00000000000000java-design-patterns-1.9.0/naked-objects/webapp/src/main/webapp/images/spinning-icon.gif000066400000000000000000000122221264154357600312520ustar00rootroot00000000000000GIF89a(EEEmmm! NETSCAPE2.0!"Created with Chimply.com"! ,((ڋ޼{ڄb扦6nL +*L،JuEUqٮ}}HNk NV1ȦgxᗈHhW2Xih` 998W *!9y[8iZ{ :+a<-A=H !@~\an. _m-!?HoOp,'lsW3[< =8H @I4A? Q6ty>+fD`y~tPd(#q4z)B!-dj>/sL1E_Š%iFY;­\%pE̽+.=|O7 NAFa yC! ,(Ɔ޼E L mbŇL*&(TU:DcOnN'lAٌSnu'D`xXeIy(RYy 2 Hi1yj)z P ں;[{{< <A\pZ, }D}mM8\[P 1PX+LNa:.O=On$5d^|MW/2HlEQE 7xdBFyAʀ3=8HpAQ -(krI+;D54S.'SM:귫vLy`? Sd颵hK*i`_v-g >6qU4rN((]Ôa[FWqSƛtfSף\ZOLe8ÅZwgޑU#97!ي?Xї F{nÑ?_}<_A4oHW1h! 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AP9i?m_}[OrZ:Sn3`kkT֛?g`cv? r0MKmV鋢%߉h3B|C@Xꑊ {w>wځoy:S_RJRʨ(M`=%g:jq4$ifA3Nmė 5}9&`MˏKbG^7=yKVrq \8%Ĕv3䔶,egLJVMQ!R3'n=y_/YnvcCSU~u0f_- ( iɲ a!g*&ێz+{0Yru,هe%Vt,VʞQEX+oSB4ռ~׏>Wئ`:SrA^0Jg,eGxW-CXB?[랓fk6dOOщ.g#:2;HT,Fpҹs|V#ٸ@[ڶ5Zu7 e쩴dLue&|>V2~X^l7 ߅Z ºk|AX] a!w a9CP)ൠ,j@TVkEHAEכBkEZq`"\60kHa[ʚ x2n,BNa!jƁIJ&t)"!ek AP57 M.R@JrY| ,A-8PVZmAcHAPkE^Br-j0.R nV, APZqPHXi "JZusZqPLXi "qܾ"8^& AS/jTpe@XzR㠂/BPԗ^Qe@Xꘐ[]@Xw Ba5 A u ,.]Z%l[K ^K java-design-patterns-1.9.0/null-object/index.md000066400000000000000000000016671264154357600214450ustar00rootroot00000000000000--- layout: pattern title: Null Object folder: null-object permalink: /patterns/null-object/ categories: Behavioral tags: - Java - Difficulty-Beginner --- **Intent:** In most object-oriented languages, such as Java or C#, references may be null. These references need to be checked to ensure they are not null before invoking any methods, because methods typically cannot be invoked on null references. Instead of using a null reference to convey absence of an object (for instance, a non-existent customer), one uses an object which implements the expected interface, but whose method body is empty. The advantage of this approach over a working default implementation is that a Null Object is very predictable and has no side effects: it does nothing. ![alt text](./etc/null-object.png "Null Object") **Applicability:** Use the Null Object pattern when * you want to avoid explicit null checks and keep the algorithm elegant and easy to read. java-design-patterns-1.9.0/null-object/pom.xml000066400000000000000000000013721264154357600213220ustar00rootroot00000000000000 4.0.0 com.iluwatar java-design-patterns 1.9.0 null-object junit junit test org.mockito mockito-core test java-design-patterns-1.9.0/null-object/src/000077500000000000000000000000001264154357600205715ustar00rootroot00000000000000java-design-patterns-1.9.0/null-object/src/main/000077500000000000000000000000001264154357600215155ustar00rootroot00000000000000java-design-patterns-1.9.0/null-object/src/main/java/000077500000000000000000000000001264154357600224365ustar00rootroot00000000000000java-design-patterns-1.9.0/null-object/src/main/java/com/000077500000000000000000000000001264154357600232145ustar00rootroot00000000000000java-design-patterns-1.9.0/null-object/src/main/java/com/iluwatar/000077500000000000000000000000001264154357600250445ustar00rootroot00000000000000java-design-patterns-1.9.0/null-object/src/main/java/com/iluwatar/nullobject/000077500000000000000000000000001264154357600272055ustar00rootroot00000000000000java-design-patterns-1.9.0/null-object/src/main/java/com/iluwatar/nullobject/App.java000066400000000000000000000015031264154357600305670ustar00rootroot00000000000000package com.iluwatar.nullobject; /** * * Null Object pattern replaces null values with neutral objects. Many times this simplifies * algorithms since no extra null checks are needed. *

* In this example we build a binary tree where the nodes are either normal or Null Objects. No null * values are used in the tree making the traversal easy. * */ public class App { /** * Program entry point * * @param args command line args */ public static void main(String[] args) { Node root = new NodeImpl("1", new NodeImpl("11", new NodeImpl("111", NullNode.getInstance(), NullNode.getInstance()), NullNode.getInstance()), new NodeImpl("12", NullNode.getInstance(), new NodeImpl("122", NullNode.getInstance(), NullNode.getInstance()))); root.walk(); } } java-design-patterns-1.9.0/null-object/src/main/java/com/iluwatar/nullobject/Node.java000066400000000000000000000003431264154357600307350ustar00rootroot00000000000000package com.iluwatar.nullobject; /** * * Interface for binary tree node. * */ public interface Node { String getName(); int getTreeSize(); Node getLeft(); Node getRight(); void walk(); } java-design-patterns-1.9.0/null-object/src/main/java/com/iluwatar/nullobject/NodeImpl.java000066400000000000000000000016221264154357600315600ustar00rootroot00000000000000package com.iluwatar.nullobject; /** * * Implementation for binary tree's normal nodes. * */ public class NodeImpl implements Node { private final String name; private final Node left; private final Node right; /** * Constructor */ public NodeImpl(String name, Node left, Node right) { this.name = name; this.left = left; this.right = right; } @Override public int getTreeSize() { return 1 + left.getTreeSize() + right.getTreeSize(); } @Override public Node getLeft() { return left; } @Override public Node getRight() { return right; } @Override public String getName() { return name; } @Override public void walk() { System.out.println(name); if (left.getTreeSize() > 0) { left.walk(); } if (right.getTreeSize() > 0) { right.walk(); } } } java-design-patterns-1.9.0/null-object/src/main/java/com/iluwatar/nullobject/NullNode.java000066400000000000000000000012031264154357600315640ustar00rootroot00000000000000package com.iluwatar.nullobject; /** * * Null Object implementation for binary tree node. *

* Implemented as Singleton, since all the NullNodes are the same. * */ public class NullNode implements Node { private static NullNode instance = new NullNode(); private NullNode() {} public static NullNode getInstance() { return instance; } @Override public int getTreeSize() { return 0; } @Override public Node getLeft() { return null; } @Override public Node getRight() { return null; } @Override public String getName() { return null; } @Override public void walk() {} } java-design-patterns-1.9.0/null-object/src/test/000077500000000000000000000000001264154357600215505ustar00rootroot00000000000000java-design-patterns-1.9.0/null-object/src/test/java/000077500000000000000000000000001264154357600224715ustar00rootroot00000000000000java-design-patterns-1.9.0/null-object/src/test/java/com/000077500000000000000000000000001264154357600232475ustar00rootroot00000000000000java-design-patterns-1.9.0/null-object/src/test/java/com/iluwatar/000077500000000000000000000000001264154357600250775ustar00rootroot00000000000000java-design-patterns-1.9.0/null-object/src/test/java/com/iluwatar/nullobject/000077500000000000000000000000001264154357600272405ustar00rootroot00000000000000java-design-patterns-1.9.0/null-object/src/test/java/com/iluwatar/nullobject/AppTest.java000066400000000000000000000003061264154357600314620ustar00rootroot00000000000000package com.iluwatar.nullobject; import org.junit.Test; /** * * Application test * */ public class AppTest { @Test public void test() { String[] args = {}; App.main(args); } } java-design-patterns-1.9.0/null-object/src/test/java/com/iluwatar/nullobject/NullNodeTest.java000066400000000000000000000020171264154357600324630ustar00rootroot00000000000000package com.iluwatar.nullobject; import org.junit.Test; import org.mockito.Mockito; import static org.junit.Assert.assertEquals; import static org.junit.Assert.assertNotNull; import static org.junit.Assert.assertNull; import static org.junit.Assert.assertSame; /** * Date: 12/26/15 - 11:47 PM * * @author Jeroen Meulemeester */ public class NullNodeTest extends StdOutTest { /** * Verify if {@link NullNode#getInstance()} actually returns the same object instance */ @Test public void testGetInstance() { final NullNode instance = NullNode.getInstance(); assertNotNull(instance); assertSame(instance, NullNode.getInstance()); } @Test public void testFields() { final NullNode node = NullNode.getInstance(); assertEquals(0, node.getTreeSize()); assertNull(node.getName()); assertNull(node.getLeft()); assertNull(node.getRight()); } @Test public void testWalk() throws Exception { NullNode.getInstance().walk(); Mockito.verifyZeroInteractions(getStdOutMock()); } }java-design-patterns-1.9.0/null-object/src/test/java/com/iluwatar/nullobject/StdOutTest.java000066400000000000000000000023341264154357600321670ustar00rootroot00000000000000package com.iluwatar.nullobject; import org.junit.After; import org.junit.Before; import java.io.PrintStream; import static org.mockito.Mockito.mock; /** * Date: 12/10/15 - 8:37 PM * * @author Jeroen Meulemeester */ public abstract class StdOutTest { /** * The mocked standard out {@link PrintStream}, required since walking through the tree has no * influence on any other accessible object, except for writing to std-out using {@link * System#out} */ private final PrintStream stdOutMock = mock(PrintStream.class); /** * Keep the original std-out so it can be restored after the test */ private final PrintStream stdOutOrig = System.out; /** * Inject the mocked std-out {@link PrintStream} into the {@link System} class before each test */ @Before public void setUp() { System.setOut(this.stdOutMock); } /** * Removed the mocked std-out {@link PrintStream} again from the {@link System} class */ @After public void tearDown() { System.setOut(this.stdOutOrig); } /** * Get the mocked stdOut {@link PrintStream} * * @return The stdOut print stream mock, renewed before each test */ final PrintStream getStdOutMock() { return this.stdOutMock; } } java-design-patterns-1.9.0/null-object/src/test/java/com/iluwatar/nullobject/TreeTest.java000066400000000000000000000063551264154357600316530ustar00rootroot00000000000000package com.iluwatar.nullobject; import org.junit.Test; import org.mockito.InOrder; import org.mockito.Mockito; import static org.junit.Assert.assertEquals; import static org.junit.Assert.assertNotNull; import static org.junit.Assert.assertSame; /** * Date: 12/26/15 - 11:44 PM * * @author Jeroen Meulemeester */ public class TreeTest extends StdOutTest { /** * During the tests, the same tree structure will be used, shown below. End points will be * terminated with the {@link NullNode} instance. * * 

   * root
   * ├── level1_a
   * │   ├── level2_a
   * │   │   ├── level3_a
   * │   │   └── level3_b
   * │   └── level2_b
   * └── level1_b
   *
*/ private static final Node TREE_ROOT; static { final NodeImpl level1B = new NodeImpl("level1_b", NullNode.getInstance(), NullNode.getInstance()); final NodeImpl level2B = new NodeImpl("level2_b", NullNode.getInstance(), NullNode.getInstance()); final NodeImpl level3A = new NodeImpl("level3_a", NullNode.getInstance(), NullNode.getInstance()); final NodeImpl level3B = new NodeImpl("level3_b", NullNode.getInstance(), NullNode.getInstance()); final NodeImpl level2A = new NodeImpl("level2_a", level3A, level3B); final NodeImpl level1A = new NodeImpl("level1_a", level2A, level2B); TREE_ROOT = new NodeImpl("root", level1A, level1B); } /** * Verify the number of items in the tree. The root has 6 children so we expect a {@link * Node#getTreeSize()} of 7 {@link Node}s in total. */ @Test public void testTreeSize() { assertEquals(7, TREE_ROOT.getTreeSize()); } /** * Walk through the tree and verify if every item is handled */ @Test public void testWalk() { TREE_ROOT.walk(); final InOrder inOrder = Mockito.inOrder(getStdOutMock()); inOrder.verify(getStdOutMock()).println("root"); inOrder.verify(getStdOutMock()).println("level1_a"); inOrder.verify(getStdOutMock()).println("level2_a"); inOrder.verify(getStdOutMock()).println("level3_a"); inOrder.verify(getStdOutMock()).println("level3_b"); inOrder.verify(getStdOutMock()).println("level2_b"); inOrder.verify(getStdOutMock()).println("level1_b"); inOrder.verifyNoMoreInteractions(); } @Test public void testGetLeft() throws Exception { final Node level1 = TREE_ROOT.getLeft(); assertNotNull(level1); assertEquals("level1_a", level1.getName()); assertEquals(5, level1.getTreeSize()); final Node level2 = level1.getLeft(); assertNotNull(level2); assertEquals("level2_a", level2.getName()); assertEquals(3, level2.getTreeSize()); final Node level3 = level2.getLeft(); assertNotNull(level3); assertEquals("level3_a", level3.getName()); assertEquals(1, level3.getTreeSize()); assertSame(NullNode.getInstance(), level3.getRight()); assertSame(NullNode.getInstance(), level3.getLeft()); } @Test public void testGetRight() throws Exception { final Node level1 = TREE_ROOT.getRight(); assertNotNull(level1); assertEquals("level1_b", level1.getName()); assertEquals(1, level1.getTreeSize()); assertSame(NullNode.getInstance(), level1.getRight()); assertSame(NullNode.getInstance(), level1.getLeft()); } } java-design-patterns-1.9.0/object-pool/000077500000000000000000000000001264154357600200015ustar00rootroot00000000000000java-design-patterns-1.9.0/object-pool/etc/000077500000000000000000000000001264154357600205545ustar00rootroot00000000000000java-design-patterns-1.9.0/object-pool/etc/object-pool.png000066400000000000000000000212551264154357600235040ustar00rootroot00000000000000PNG  IHDR#NB("tIDATx]Uw^%I/B 7FbLJZ6%M_R [)V Z<[Z *kJrP%- DJJ[%1nzǼk̞Yϓk={7kq *_OZ!AUh7:"uQONJ|=2DI2#H3@L7f4 a tivyOvmn G2JE:I *b;z2JFfnWO_\懋ë9G'\+{ aJʨב*LM)R'AWIO.3Q)|aR#HH!%"]<|H@2G]DJ)ښM*]W%^N+":hŌaYU/tu/V=z4U02(k.iz4M#\WwXmĨ^Цq*M+$-.{P|h @^rHz۴Žkmx/Tj $qTQ"/nIy{}1>) jT׈e QMŬ ni0YNZk n iH@0f4;JҜ/M^ ivX)xMuגmr=AH#7˛bVzI+bHz R|={}#NؠYSCF)h=ҭגKz,4RXr/ N4iluE捪=&0d'N!k(es(rp˅,Qa㫌3~7lL4 תf7{T+~7#7_2"x/r]"\ll"-C_$-ߍ܃/xuQycM%Ƨ7wǟrCq֔9߬)l@>_\¹r8'E#qUv &Q`u|Lwb"yx^KIO~|6Eq╭Wj;L[?u87\9pLCT$iv]5X̛#G'oGWORH"A 80 K)Ͱ܃ ̞(!2y {I;6#B\% Ց">A_%hJii<$i|vX#o \7b49?GV-^I/=9w_^s/`=M q*̯\iam݅JS)_5DK~z&}ZpMN{4o%Yw{|Hv8䚽ɧ%dI.?,Qa Kh<-.1y2 sygio{`&&˻/y`ٲǮ^l_we\A>kL|#!RUSBQ54CrMe<{Q&KO<1m9J &/ʅܲ'dbBXnVdwz,ru3>_H^45-l n+bVN`@0f4; n iH@0HqϙgH-"/;-wHd?T~Qcmz#n`\n~? bu[q_$ ".N;2J9I+$e[__.f'=7s2`iĖ]ZvԻAI%Opf^Y@?̔/q)=sￜ2JE9IK PFʵ-Cۑ]w"?E(%.hߦY]&"/KBYa5Mc"^&L,ap Ki*IPfS @0f4; n iH@0=i Ӂ:8/8I*6DM:=n iH@fi??$F6/hvF 7/hAfi=C6:i|J9ѲSk,&XlҨ=f$ʚY!sKp%'h2JFܧZǤ{ ޴^cDy6MiU;\#L,A\|; 2&6P )&!IHS;GͷA}Cé~TQK_\4۴d#X?O[d48InҖr_|>G6j=IHʿdYCkZo=4 a%T9ފLp1a󽉳xdR8I sPոD>SW_ hnvByGфw&,))v2J58IQIĕDjҮ/n>;ys7 o?QµE)t4hfV 5ҚHZ>' kY0b:v*st7proh3-Ip?8t@C32HL&EAHI HFV𤩳HSjI:HGtu۱m$11i zDާq_D˛2Je9Цwiԩ#QR*ttc-6=M^[(dD3囔~jRYN4uAj,igbNm?<)qŞ (fٍ=q6.bi9zs d#-UĩYZ\"o_O}".[lODbS>{b~E!ODJPiNDD7]G7oi v>Η\__x_Jwjاߎh?Et'Bl?װ*e tivH3@L7fB˽=H Byv'Yf +4ACVA %A찜]G @ #?- )k=w 2vlx115eSl<c!$bu9#-X:Bg/8]?޻LWP6p_mfF8BBk"ik%[07@sM}0pv&֎VbpckD)y7{ëR.H,Tp 9AԈȗj(E9Ik5ૡR&藟#51x?ysjh3S3M3D`x0! /NܡZjj(E9Ik{oc]aeC8R5>zO;/;@Ȧb7V6^ނ.c2xYHKsFyZH?h@mvr_":.?ҡAV,VGUl#-Y̵a{rѤ;0uف_f>*;BtJfaC$t-5> '~Htu-)Lcېk(;I|g$N 473XiJ}IkYJZ n iH@0f4; n iH@JH6Lu WSCF)?1gCRTm'zLJZpbHX(~IRCF)ĸΞne %}iD=&"-Q8&<`%'~\)o`QֳqyD9PGQ3_!ռwDc줥 \x|MzF.lt9 #-+8tQ̗CՐP— -m8/5366R 89T2B/ҭ1e|it='-Ʊklj=*2UđUYu8*i%]ۚ,q#n:i$v z'9HsFs{O~+؋Yš2f'cta0bހ405!Z*DI t;*W][A9evu\N+5bi!}<][AyevuҤN5QC/ ٧&\D#~5JU%cb]u ?Xl1"Advutk'"28Qx2BD0[[A9ؘk)l icD&kf5HX &bi h >4 'f4L4f@H3@}i&HOEֺ%AJ\G۸1HR6.a ҠT*(:f:K0iP*sݚ%AJE\f cRA11GK0iP*sݺ%AJ͊6h cR#ƈ1HR@}i&HO Di h >4 'VX#Cvȶk… Ϟ=[Y@,HFAxg>ei+Wvuɲ4i]@ {Hۿ5kƍwU@ {H#ƹ9q/Ӂ AwSNj/kA,!mϞ=v}NdYBҥKG}ϯt H i"j䆭 U66==}JR i>}4tƓvEi?v| HƓF A񤑮cLɹ[ BƓ&JH 2S%H̔m~ 3e_4L 2S%H̔m~ 3e_4L 2S%H̔m~ 3e_4L 2S%H̔m~ 3e_4L 2S%H̔m~ 3e_4L 2S%H̔m~ 3e_4L%E3U0Vߣ?O55{X5$imSݤ@Z@T@HHiPi B AU`N}g扉jk6Iݭ 46IփOn{MF/z-IݳM36F[[:ŷ_xћA^z-޳DGFzd+ y2946rx -AZT iHZf7{ѿzKe㻑f@*!*`??kn߳4ܰj0q4= i'=&o46 Jž=^xϒovO>{_;>fzigilbis-OE> WaM-{}?{mA^{_S)b=ʨp3=_iXQi=BUV nY{דWMRTR{@ZTf6,}d͕h{#H4 4U!Ҡ*@T@HHiPj8i?)suڦzA AZT;it?)|.ꍂpy4֦G8``У3}4Ǎ1AT7i9ւWzx%!6awYst` r] AT3i9N8y!OQҼp0<=@-c4oҦe -\ӐƏޠʢxtIc*izH`,&wY4^& G6KO\(ҠT?i464U!Ҡ*@T@HHiPJZ Ӂ)R2MhЦAU4 4U!Ҡ*'"OD&ihӠ*@T@HP9 m<#K>mxҖrخ}LimSYqHk@HPeG6͛gUlst^ǎvnq! Ҡ4*՗fl8'".ftwx"? '{V6@ڵz3o&-AN4rOڑ9fgyĹi9% .$ mK]\ '6CޒD!<+0GO7;{KTYLQ4!;wh3O4(VyI–׶n;-6$f!MR)r{->;169q3I'6iP%o9nJޒD![8)P 6EGtoҠ_1sWzٸbI>=;ȉ={*r)AH<Odk۷!A겍{ʯ""{|A +b#TyKOFF+߳ O2f,k(!e&Ҡ*@T@HHiPi B AU4 51OـonFڱ"mltv8)3"AZU i.cH,6Fe[wl~Ll571W Z"AZUiGf.r>y<?~dEJ0wV,FF A Ңf mH7Hkv S3G98;h_<6FӐon%|Ow^4j5X iV?h@mv1G6U?MsV@㣡͈iV1ODLcv`Wy4OD8raܴ&'"!lqO+iVaO?ebyʲЕǡ)\ *Y8imHiPi B AU4 % @ʼng &\Y! 4B 7awIENDB`java-design-patterns-1.9.0/object-pool/etc/object-pool.ucls000066400000000000000000000054641264154357600236720ustar00rootroot00000000000000 java-design-patterns-1.9.0/object-pool/index.md000066400000000000000000000012421264154357600214310ustar00rootroot00000000000000--- layout: pattern title: Object Pool folder: object-pool permalink: /patterns/object-pool/ categories: Creational tags: - Java - Difficulty-Beginner - Performance --- **Intent:** When objects are expensive to create and they are needed only for short periods of time it is advantageous to utilize the Object Pool pattern. The Object Pool provides a cache for instantiated objects tracking which ones are in use and which are available. ![alt text](./etc/object-pool.png "Object Pool") **Applicability:** Use the Object Pool pattern when * the objects are expensive to create (allocation cost) * you need a large number of short-lived objects (memory fragmentation) java-design-patterns-1.9.0/object-pool/pom.xml000066400000000000000000000011541264154357600213170ustar00rootroot00000000000000 4.0.0 com.iluwatar java-design-patterns 1.9.0 object-pool junit junit test java-design-patterns-1.9.0/object-pool/src/000077500000000000000000000000001264154357600205705ustar00rootroot00000000000000java-design-patterns-1.9.0/object-pool/src/main/000077500000000000000000000000001264154357600215145ustar00rootroot00000000000000java-design-patterns-1.9.0/object-pool/src/main/java/000077500000000000000000000000001264154357600224355ustar00rootroot00000000000000java-design-patterns-1.9.0/object-pool/src/main/java/com/000077500000000000000000000000001264154357600232135ustar00rootroot00000000000000java-design-patterns-1.9.0/object-pool/src/main/java/com/iluwatar/000077500000000000000000000000001264154357600250435ustar00rootroot00000000000000java-design-patterns-1.9.0/object-pool/src/main/java/com/iluwatar/object/000077500000000000000000000000001264154357600263115ustar00rootroot00000000000000java-design-patterns-1.9.0/object-pool/src/main/java/com/iluwatar/object/pool/000077500000000000000000000000001264154357600272625ustar00rootroot00000000000000java-design-patterns-1.9.0/object-pool/src/main/java/com/iluwatar/object/pool/App.java000066400000000000000000000043561264154357600306550ustar00rootroot00000000000000package com.iluwatar.object.pool; /** * * When it is necessary to work with a large number of objects that are particularly expensive to * instantiate and each object is only needed for a short period of time, the performance of an * entire application may be adversely affected. An object pool design pattern may be deemed * desirable in cases such as these. *

* The object pool design pattern creates a set of objects that may be reused. When a new object is * needed, it is requested from the pool. If a previously prepared object is available it is * returned immediately, avoiding the instantiation cost. If no objects are present in the pool, a * new item is created and returned. When the object has been used and is no longer needed, it is * returned to the pool, allowing it to be used again in the future without repeating the * computationally expensive instantiation process. It is important to note that once an object has * been used and returned, existing references will become invalid. *

* In this example we have created {@link OliphauntPool} inheriting from generic {@link ObjectPool}. * {@link Oliphaunt}s can be checked out from the pool and later returned to it. The pool tracks * created instances and their status (available, inUse). * */ public class App { /** * Program entry point * * @param args command line args */ public static void main(String[] args) { OliphauntPool pool = new OliphauntPool(); System.out.println(pool); Oliphaunt oliphaunt1 = pool.checkOut(); System.out.println("Checked out " + oliphaunt1); System.out.println(pool); Oliphaunt oliphaunt2 = pool.checkOut(); System.out.println("Checked out " + oliphaunt2); Oliphaunt oliphaunt3 = pool.checkOut(); System.out.println("Checked out " + oliphaunt3); System.out.println(pool); System.out.println("Checking in " + oliphaunt1); pool.checkIn(oliphaunt1); System.out.println("Checking in " + oliphaunt2); pool.checkIn(oliphaunt2); System.out.println(pool); Oliphaunt oliphaunt4 = pool.checkOut(); System.out.println("Checked out " + oliphaunt4); Oliphaunt oliphaunt5 = pool.checkOut(); System.out.println("Checked out " + oliphaunt5); System.out.println(pool); } } java-design-patterns-1.9.0/object-pool/src/main/java/com/iluwatar/object/pool/ObjectPool.java000066400000000000000000000014301264154357600321630ustar00rootroot00000000000000package com.iluwatar.object.pool; import java.util.HashSet; /** * * Generic object pool */ public abstract class ObjectPool { private HashSet available = new HashSet<>(); private HashSet inUse = new HashSet<>(); protected abstract T create(); /** * Checkout object from pool */ public synchronized T checkOut() { if (available.size() <= 0) { available.add(create()); } T instance = available.iterator().next(); available.remove(instance); inUse.add(instance); return instance; } public synchronized void checkIn(T instance) { inUse.remove(instance); available.add(instance); } @Override public String toString() { return String.format("Pool available=%d inUse=%d", available.size(), inUse.size()); } } java-design-patterns-1.9.0/object-pool/src/main/java/com/iluwatar/object/pool/Oliphaunt.java000066400000000000000000000007621264154357600320750ustar00rootroot00000000000000package com.iluwatar.object.pool; /** * * Oliphaunts are expensive to create * */ public class Oliphaunt { private static int counter = 1; private final int id; /** * Constructor */ public Oliphaunt() { id = counter++; try { Thread.sleep(1000); } catch (InterruptedException e) { e.printStackTrace(); } } public int getId() { return id; } @Override public String toString() { return String.format("Oliphaunt id=%d", id); } } java-design-patterns-1.9.0/object-pool/src/main/java/com/iluwatar/object/pool/OliphauntPool.java000066400000000000000000000003261264154357600327230ustar00rootroot00000000000000package com.iluwatar.object.pool; /** * * Oliphaunt object pool * */ public class OliphauntPool extends ObjectPool { @Override protected Oliphaunt create() { return new Oliphaunt(); } } java-design-patterns-1.9.0/object-pool/src/test/000077500000000000000000000000001264154357600215475ustar00rootroot00000000000000java-design-patterns-1.9.0/object-pool/src/test/java/000077500000000000000000000000001264154357600224705ustar00rootroot00000000000000java-design-patterns-1.9.0/object-pool/src/test/java/com/000077500000000000000000000000001264154357600232465ustar00rootroot00000000000000java-design-patterns-1.9.0/object-pool/src/test/java/com/iluwatar/000077500000000000000000000000001264154357600250765ustar00rootroot00000000000000java-design-patterns-1.9.0/object-pool/src/test/java/com/iluwatar/object/000077500000000000000000000000001264154357600263445ustar00rootroot00000000000000java-design-patterns-1.9.0/object-pool/src/test/java/com/iluwatar/object/pool/000077500000000000000000000000001264154357600273155ustar00rootroot00000000000000java-design-patterns-1.9.0/object-pool/src/test/java/com/iluwatar/object/pool/AppTest.java000066400000000000000000000003071264154357600315400ustar00rootroot00000000000000package com.iluwatar.object.pool; import org.junit.Test; /** * * Application test * */ public class AppTest { @Test public void test() { String[] args = {}; App.main(args); } } java-design-patterns-1.9.0/object-pool/src/test/java/com/iluwatar/object/pool/OliphauntPoolTest.java000066400000000000000000000067351264154357600336300ustar00rootroot00000000000000package com.iluwatar.object.pool; import org.junit.Test; import java.util.Arrays; import java.util.List; import static org.junit.Assert.assertEquals; import static org.junit.Assert.assertNotSame; import static org.junit.Assert.assertSame; import static org.junit.Assert.assertTrue; /** * Date: 12/27/15 - 1:05 AM * * @author Jeroen Meulemeester */ public class OliphauntPoolTest { /** * Use the same object 100 times subsequently. This should not take much time since the heavy * object instantiation is done only once. Verify if we get the same object each time. */ @Test(timeout = 5000) public void testSubsequentCheckinCheckout() { final OliphauntPool pool = new OliphauntPool(); assertEquals(pool.toString(), "Pool available=0 inUse=0"); final Oliphaunt expectedOliphaunt = pool.checkOut(); assertEquals(pool.toString(), "Pool available=0 inUse=1"); pool.checkIn(expectedOliphaunt); assertEquals(pool.toString(), "Pool available=1 inUse=0"); for (int i = 0; i < 100; i++) { final Oliphaunt oliphaunt = pool.checkOut(); assertEquals(pool.toString(), "Pool available=0 inUse=1"); assertSame(expectedOliphaunt, oliphaunt); assertEquals(expectedOliphaunt.getId(), oliphaunt.getId()); assertEquals(expectedOliphaunt.toString(), oliphaunt.toString()); pool.checkIn(oliphaunt); assertEquals(pool.toString(), "Pool available=1 inUse=0"); } } /** * Use the same object 100 times subsequently. This should not take much time since the heavy * object instantiation is done only once. Verify if we get the same object each time. */ @Test(timeout = 5000) public void testConcurrentCheckinCheckout() { final OliphauntPool pool = new OliphauntPool(); assertEquals(pool.toString(), "Pool available=0 inUse=0"); final Oliphaunt firstOliphaunt = pool.checkOut(); assertEquals(pool.toString(), "Pool available=0 inUse=1"); final Oliphaunt secondOliphaunt = pool.checkOut(); assertEquals(pool.toString(), "Pool available=0 inUse=2"); assertNotSame(firstOliphaunt, secondOliphaunt); assertEquals(firstOliphaunt.getId() + 1, secondOliphaunt.getId()); // After checking in the second, we should get the same when checking out a new oliphaunt ... pool.checkIn(secondOliphaunt); assertEquals(pool.toString(), "Pool available=1 inUse=1"); final Oliphaunt oliphaunt3 = pool.checkOut(); assertEquals(pool.toString(), "Pool available=0 inUse=2"); assertSame(secondOliphaunt, oliphaunt3); // ... and the same applies for the first one pool.checkIn(firstOliphaunt); assertEquals(pool.toString(), "Pool available=1 inUse=1"); final Oliphaunt oliphaunt4 = pool.checkOut(); assertEquals(pool.toString(), "Pool available=0 inUse=2"); assertSame(firstOliphaunt, oliphaunt4); // When both oliphaunt return to the pool, we should still get the same instances pool.checkIn(firstOliphaunt); assertEquals(pool.toString(), "Pool available=1 inUse=1"); pool.checkIn(secondOliphaunt); assertEquals(pool.toString(), "Pool available=2 inUse=0"); // The order of the returned instances is not determined, so just put them in a list // and verify if both expected instances are in there. final List oliphaunts = Arrays.asList(pool.checkOut(), pool.checkOut()); assertEquals(pool.toString(), "Pool available=0 inUse=2"); assertTrue(oliphaunts.contains(firstOliphaunt)); assertTrue(oliphaunts.contains(secondOliphaunt)); } }java-design-patterns-1.9.0/observer/000077500000000000000000000000001264154357600174135ustar00rootroot00000000000000java-design-patterns-1.9.0/observer/etc/000077500000000000000000000000001264154357600201665ustar00rootroot00000000000000java-design-patterns-1.9.0/observer/etc/observer.png000066400000000000000000000474031264154357600225330ustar00rootroot00000000000000PNG  IHDRڴNIDATx}\}]Kd?b%RҡX=,!*@QJŽ Z6⌘;'FKuT)Ju*gݥ.Ee^z~o>_Owon x|W i@E,9 !To `%`5 @ŠwAB6 #jA_ z'!h#|10BڭN2StOFa(ac#0hD+pNr,(ac#0hĐAd ~ D?(Fۇ6bNz!, lEH:o(bM ,.7Jjr#SzQ1`0‰7B/bճ H~im4{d<kNϒlTYtFJbR61ߞW0Bsқϐ)")gHLa7C%$hVyB-D v L Wlj0¢q aEӛ̐`t*.Of" #Z5/`J_q}PȿDD_ #z7B/7AI6:[~dNݙ^ڥ1ttҔ1j͚O$b!лz!,?˯a J2Wf7QTZMJ)Ǩ@?¬9L ,sx_ #ω7B/O"CydGŇVc{'8&曛Tvg C!ŗք90 o"[5 _ z'!h#|10BŠwAB6 #jA_ z'!h#|10BŠwA[񃋷<_/~VrMRתI/0 # 0ƂL,rAJr;HSg-*gن{f/M4aGr̄F48>=NXl u~oucxD/Cމ[xhKu# M*nB (l BwrLRD{_HW~!X(Vg!\h<f3# N&Mc]I+n?>&yT2YKA'n{7O]wr$?|kcC(዇c &*[i۝o`k`c@7c5UW8 f<ߑp_XOA[o:qS&U٧~w1|SFy #D$2gymyK'c3ߤEbne( %s)֕_l,08׍ /Ss*[ ykplQ|}tH߼}\|x?7~xi;82Ѭ g'YlȇдSp YKA@t\޳ zv>ֿ;[ܭDSԁr3̷:%,{CUG7u0Ib X.a!R$-wPտo/҅H?ٛN|?$A0/%@ _r # &n/^Q؏SՅ>;~W?e6 mk)wsݯ-{g&~y+Kux@?e L܎0e iy+GG-b━Ioc@WnpF3?>`fA`{ @Z o}~}ߺ[G:\{7wO-*LBo)w55h/D CݺX.apHf6YXUm^ڤ7cZp[5:?tGo:q^/&)]z|0~)e`/60B/WKd|1`5 8nu|65EJ $#s7D5e}qd0,BUo$)-24EDGg6 8) Ry(b9Z_G/gz#6kjmm"v88^{ 0h0񟘿_%u)M Q% L89FAA7Ea) A-t;{ϙo>y䂼|`D ̄4%T.v0h xyH$ ,}G.eFh,GiJpc a ԔR0*bl6[K1 oDY9Vv0h ]ȿ%IY|._SK%:cxH#LDv0PXW#d3q1Ry1Ѵ@pJQ|N0h {'}ec֥Y(d9B.(RfWBFh_Thu2aTY[#\K֝,0׻D/M e\y {wn⎥ G /:$~x|C#|0ۿF',o{ayV(FX=N7$}v7e2V3_ #Ґ`]Xڱm[5/Yx=g/׏ /K$dc|#bS|_7G78wGp ?ZN7J󈻂EEtb ` >}ֵ5ȧA& UXKgo#߱e9 jўa7 ɀ9 )l;*{-'AGw-Ͻxʓ%IT^ (`9I3oI<ܙ/ҿL]9w?-A>|׎$!/I-\PdhَJx$IRڴE955Tm%s=ճ̳@;bqb~a0zw~DCb/({)i[U/M\Ȯ?wO_$e C q#l2HFy~K[N+ڢȕ"ہ6LٖGE0>*FXo#om۰€gQk3{΃m^FaI=֓{2b,ITF *wpws*FXs#kllZdvbU2 [ChPF呛 G-K~U`}P#Zye6G(b䖴8Rٛ^,_ #FX6X(l nM>UV'}fbH#ld灰QX kIb;a X !@A`5 m/FP/j@E, AN[ZA1|( <*L4 "A@M}W(-r`PwAii6{}BA:}[ܭ/`dFTrSo\|wҀ_XmO${w;*dci#un0 $dnnw-ް K'a?m` FHAV.znc@/,`dzw9}'O~\鶳sѽx(@/ P'J׬cP'ϟ+<^w1U&wφxMVl:4׋[niA$D0$ZXC&AGw-Ͻxʓ%IT:+bKi,ɝ'|'tJѤpvO3ξW tY؀HUNNuC}m7LMJRN'45"~a|}#I?B^DpȽu׺Oe=ewjK.бe]KvK}B.?&Ӛ}IK+/R0MO 7-] &KKK0LGv~fn{b $+ ׳pn <8躶䜅BƍّI]+#l\k^Lo:)]+"_'v3hVqBL6/^! {'}ec֥YhjO3L fzL8Nhͦo!?JJμ9Bjh+~iӦK.! w'XpK RciXz N G%?>'OT¥*2VaurmDw.EW&Q^oZnH*$+k¸r*n@/,sɅ&гvõh<)^lZ^@eCpuK"-3I+ul5SrO{!"Kއ@O[osNlhX Bc42 \`5~A0"H ~ A0[ T2! pA0X^^~}8Q NZ]]] @D(BSSS;XCDՅa 'þk4A`4T@vNv@s9MI( H`D`/J -~, Bc!` _tbr0VA`~(y< Ahyf ޽L7Wv]wĜS3 [gwv B  (&&AGw-Ͻxʓ%IKqONϣ=");=z-&۩is'}j A؀- 0 w>>|׎$!/I-^H" 뉅wD9cgE8DKz1tA l~5~aW?3s$Bۗ#ɺUv/׵+is*TA#k]]/@/L`هs珝'[fI([|/t^H]hΩQLăAA,d0Q0 {wn⎥ G /<|W]\H36|D_X$o} A? 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D~̏vdEe4UWa ]ﾋEGw1\./sӦZKvJDOeƆ` ""4jȁO<9lkYYudk0SU?P$~pVF54/nӛ!n>{кzjNcc6ܿ -T9t%m(U-PAq Jg-]:fM+_ }NN谇7ґ>OWB[l j!^4j{};)~Tb5i\Lc?P$~.m83ԟ!Fbόq%!aTϹ"!"BJWҟFMf:0][2Jqff8! ;lF11_+QpyNJ,ř)HȓT9 P~@( D? DB"!}-+V@#B B)~@!D_2^:IENDB`java-design-patterns-1.9.0/observer/index.md000066400000000000000000000024371264154357600210520ustar00rootroot00000000000000--- layout: pattern title: Observer folder: observer permalink: /patterns/observer/ categories: Behavioral tags: - Java - Difficulty-Beginner - Gang Of Four --- **Also known as:** Dependents, Publish-Subscribe **Intent:** Define a one-to-many dependency between objects so that when one object changes state, all its dependents are notified and updated automatically. ![alt text](./etc/observer_1.png "Observer") **Applicability:** Use the Observer pattern in any of the following situations * when an abstraction has two aspects, one dependent on the other. Encapsulating these aspects in separate objects lets you vary and reuse them independently * when a change to one object requires changing others, and you don't know how many objects need to be changed * when an object should be able to notify other objects without making assumptions about who these objects are. In other words, you don't want these objects tightly coupled **Typical Use Case:** * changing in one object leads to a change in other objects **Real world examples:** * [java.util.Observer](http://docs.oracle.com/javase/8/docs/api/java/util/Observer.html) **Credits** * [Design Patterns: Elements of Reusable Object-Oriented Software](http://www.amazon.com/Design-Patterns-Elements-Reusable-Object-Oriented/dp/0201633612) java-design-patterns-1.9.0/observer/pom.xml000066400000000000000000000013671264154357600207370ustar00rootroot00000000000000 4.0.0 com.iluwatar java-design-patterns 1.9.0 observer junit junit test org.mockito mockito-core test java-design-patterns-1.9.0/observer/src/000077500000000000000000000000001264154357600202025ustar00rootroot00000000000000java-design-patterns-1.9.0/observer/src/main/000077500000000000000000000000001264154357600211265ustar00rootroot00000000000000java-design-patterns-1.9.0/observer/src/main/java/000077500000000000000000000000001264154357600220475ustar00rootroot00000000000000java-design-patterns-1.9.0/observer/src/main/java/com/000077500000000000000000000000001264154357600226255ustar00rootroot00000000000000java-design-patterns-1.9.0/observer/src/main/java/com/iluwatar/000077500000000000000000000000001264154357600244555ustar00rootroot00000000000000java-design-patterns-1.9.0/observer/src/main/java/com/iluwatar/observer/000077500000000000000000000000001264154357600263045ustar00rootroot00000000000000java-design-patterns-1.9.0/observer/src/main/java/com/iluwatar/observer/App.java000066400000000000000000000032171264154357600276720ustar00rootroot00000000000000package com.iluwatar.observer; import com.iluwatar.observer.generic.GHobbits; import com.iluwatar.observer.generic.GOrcs; import com.iluwatar.observer.generic.GWeather; /** * * The Observer pattern is a software design pattern in which an object, called the subject, * maintains a list of its dependents, called observers, and notifies them automatically of any * state changes, usually by calling one of their methods. It is mainly used to implement * distributed event handling systems. The Observer pattern is also a key part in the familiar * model–view–controller (MVC) architectural pattern. The Observer pattern is implemented in * numerous programming libraries and systems, including almost all GUI toolkits. *

* In this example {@link Weather} has a state that can be observed. The {@link Orcs} and * {@link Hobbits} register as observers and receive notifications when the {@link Weather} changes. * */ public class App { /** * Program entry point * * @param args command line args */ public static void main(String[] args) { Weather weather = new Weather(); weather.addObserver(new Orcs()); weather.addObserver(new Hobbits()); weather.timePasses(); weather.timePasses(); weather.timePasses(); weather.timePasses(); // Generic observer inspired by Java Generics and Collection by Naftalin & Wadler System.out.println("\n--Running generic version--"); GWeather gWeather = new GWeather(); gWeather.addObserver(new GOrcs()); gWeather.addObserver(new GHobbits()); gWeather.timePasses(); gWeather.timePasses(); gWeather.timePasses(); gWeather.timePasses(); } } java-design-patterns-1.9.0/observer/src/main/java/com/iluwatar/observer/Hobbits.java000066400000000000000000000012561264154357600305450ustar00rootroot00000000000000package com.iluwatar.observer; /** * * Hobbits * */ public class Hobbits implements WeatherObserver { @Override public void update(WeatherType currentWeather) { switch (currentWeather) { case COLD: System.out.println("The hobbits are shivering in the cold weather."); break; case RAINY: System.out.println("The hobbits look for cover from the rain."); break; case SUNNY: System.out.println("The happy hobbits bade in the warm sun."); break; case WINDY: System.out.println("The hobbits hold their hats tightly in the windy weather."); break; default: break; } } } java-design-patterns-1.9.0/observer/src/main/java/com/iluwatar/observer/Orcs.java000066400000000000000000000011551264154357600300570ustar00rootroot00000000000000package com.iluwatar.observer; /** * * Orcs * */ public class Orcs implements WeatherObserver { @Override public void update(WeatherType currentWeather) { switch (currentWeather) { case COLD: System.out.println("The orcs are freezing cold."); break; case RAINY: System.out.println("The orcs are dripping wet."); break; case SUNNY: System.out.println("The sun hurts the orcs' eyes."); break; case WINDY: System.out.println("The orc smell almost vanishes in the wind."); break; default: break; } } } java-design-patterns-1.9.0/observer/src/main/java/com/iluwatar/observer/Weather.java000066400000000000000000000017711264154357600305540ustar00rootroot00000000000000package com.iluwatar.observer; import java.util.ArrayList; import java.util.List; /** * * Weather can be observed by implementing {@link WeatherObserver} interface and registering as * listener. * */ public class Weather { private WeatherType currentWeather; private List observers; public Weather() { observers = new ArrayList<>(); currentWeather = WeatherType.SUNNY; } public void addObserver(WeatherObserver obs) { observers.add(obs); } public void removeObserver(WeatherObserver obs) { observers.remove(obs); } /** * Makes time pass for weather */ public void timePasses() { WeatherType[] enumValues = WeatherType.values(); currentWeather = enumValues[(currentWeather.ordinal() + 1) % enumValues.length]; System.out.println("The weather changed to " + currentWeather + "."); notifyObservers(); } private void notifyObservers() { for (WeatherObserver obs : observers) { obs.update(currentWeather); } } } java-design-patterns-1.9.0/observer/src/main/java/com/iluwatar/observer/WeatherObserver.java000066400000000000000000000002451264154357600322570ustar00rootroot00000000000000package com.iluwatar.observer; /** * * Observer interface. * */ public interface WeatherObserver { void update(WeatherType currentWeather); } java-design-patterns-1.9.0/observer/src/main/java/com/iluwatar/observer/WeatherType.java000066400000000000000000000003311264154357600314050ustar00rootroot00000000000000package com.iluwatar.observer; /** * * WeatherType enumeration * */ public enum WeatherType { SUNNY, RAINY, WINDY, COLD; @Override public String toString() { return this.name().toLowerCase(); } } java-design-patterns-1.9.0/observer/src/main/java/com/iluwatar/observer/generic/000077500000000000000000000000001264154357600277205ustar00rootroot00000000000000java-design-patterns-1.9.0/observer/src/main/java/com/iluwatar/observer/generic/GHobbits.java000066400000000000000000000013431264154357600322650ustar00rootroot00000000000000package com.iluwatar.observer.generic; import com.iluwatar.observer.WeatherType; /** * * GHobbits * */ public class GHobbits implements Race { @Override public void update(GWeather weather, WeatherType weatherType) { switch (weatherType) { case COLD: System.out.println("The hobbits are shivering in the cold weather."); break; case RAINY: System.out.println("The hobbits look for cover from the rain."); break; case SUNNY: System.out.println("The happy hobbits bade in the warm sun."); break; case WINDY: System.out.println("The hobbits hold their hats tightly in the windy weather."); break; default: break; } } } java-design-patterns-1.9.0/observer/src/main/java/com/iluwatar/observer/generic/GOrcs.java000066400000000000000000000012431264154357600316000ustar00rootroot00000000000000package com.iluwatar.observer.generic; import com.iluwatar.observer.WeatherType; /** * * GOrcs * */ public class GOrcs implements Race { @Override public void update(GWeather weather, WeatherType weatherType) { switch (weatherType) { case COLD: System.out.println("The orcs are freezing cold."); break; case RAINY: System.out.println("The orcs are dripping wet."); break; case SUNNY: System.out.println("The sun hurts the orcs' eyes."); break; case WINDY: System.out.println("The orc smell almost vanishes in the wind."); break; default: break; } } } java-design-patterns-1.9.0/observer/src/main/java/com/iluwatar/observer/generic/GWeather.java000066400000000000000000000011521264154357600322700ustar00rootroot00000000000000package com.iluwatar.observer.generic; import com.iluwatar.observer.WeatherType; /** * * GWeather * */ public class GWeather extends Observable { private WeatherType currentWeather; public GWeather() { currentWeather = WeatherType.SUNNY; } /** * Makes time pass for weather */ public void timePasses() { WeatherType[] enumValues = WeatherType.values(); currentWeather = enumValues[(currentWeather.ordinal() + 1) % enumValues.length]; System.out.println("The weather changed to " + currentWeather + "."); notifyObservers(currentWeather); } } java-design-patterns-1.9.0/observer/src/main/java/com/iluwatar/observer/generic/Observable.java000066400000000000000000000015301264154357600326460ustar00rootroot00000000000000package com.iluwatar.observer.generic; import java.util.List; import java.util.concurrent.CopyOnWriteArrayList; /** * Generic observer inspired by Java Generics and Collection by Naftalin & Wadler * * @param Subject * @param Observer * @param Argument type */ public abstract class Observable, O extends Observer, A> { protected List observers; public Observable() { this.observers = new CopyOnWriteArrayList<>(); } public void addObserver(O observer) { this.observers.add(observer); } public void removeObserver(O observer) { this.observers.remove(observer); } /** * Notify observers */ @SuppressWarnings("unchecked") public void notifyObservers(A argument) { for (O observer : observers) { observer.update((S) this, argument); } } } java-design-patterns-1.9.0/observer/src/main/java/com/iluwatar/observer/generic/Observer.java000066400000000000000000000003041264154357600323470ustar00rootroot00000000000000package com.iluwatar.observer.generic; /** * * Observer */ public interface Observer, O extends Observer, A> { void update(S subject, A argument); } java-design-patterns-1.9.0/observer/src/main/java/com/iluwatar/observer/generic/Race.java000066400000000000000000000002621264154357600314350ustar00rootroot00000000000000package com.iluwatar.observer.generic; import com.iluwatar.observer.WeatherType; /** * * Race * */ public interface Race extends Observer { } java-design-patterns-1.9.0/observer/src/test/000077500000000000000000000000001264154357600211615ustar00rootroot00000000000000java-design-patterns-1.9.0/observer/src/test/java/000077500000000000000000000000001264154357600221025ustar00rootroot00000000000000java-design-patterns-1.9.0/observer/src/test/java/com/000077500000000000000000000000001264154357600226605ustar00rootroot00000000000000java-design-patterns-1.9.0/observer/src/test/java/com/iluwatar/000077500000000000000000000000001264154357600245105ustar00rootroot00000000000000java-design-patterns-1.9.0/observer/src/test/java/com/iluwatar/observer/000077500000000000000000000000001264154357600263375ustar00rootroot00000000000000java-design-patterns-1.9.0/observer/src/test/java/com/iluwatar/observer/AppTest.java000066400000000000000000000003041264154357600305570ustar00rootroot00000000000000package com.iluwatar.observer; import org.junit.Test; /** * * Application test * */ public class AppTest { @Test public void test() { String[] args = {}; App.main(args); } } java-design-patterns-1.9.0/observer/src/test/java/com/iluwatar/observer/HobbitsTest.java000066400000000000000000000023241264154357600314350ustar00rootroot00000000000000package com.iluwatar.observer; import org.junit.runner.RunWith; import org.junit.runners.Parameterized; import java.util.ArrayList; import java.util.Collection; /** * Date: 12/27/15 - 12:07 PM * * @author Jeroen Meulemeester */ @RunWith(Parameterized.class) public class HobbitsTest extends WeatherObserverTest { @Parameterized.Parameters public static Collection data() { final ArrayList testData = new ArrayList<>(); testData.add(new Object[]{WeatherType.SUNNY, "The happy hobbits bade in the warm sun."}); testData.add(new Object[]{WeatherType.RAINY, "The hobbits look for cover from the rain."}); testData.add(new Object[]{WeatherType.WINDY, "The hobbits hold their hats tightly in the windy weather."}); testData.add(new Object[]{WeatherType.COLD, "The hobbits are shivering in the cold weather."}); return testData; } /** * Create a new test with the given weather and expected response * * @param weather The weather that should be unleashed on the observer * @param response The expected response from the observer */ public HobbitsTest(final WeatherType weather, final String response) { super(weather, response, Hobbits::new); } } java-design-patterns-1.9.0/observer/src/test/java/com/iluwatar/observer/OrcsTest.java000066400000000000000000000022151264154357600307500ustar00rootroot00000000000000package com.iluwatar.observer; import org.junit.runner.RunWith; import org.junit.runners.Parameterized; import java.util.ArrayList; import java.util.Collection; /** * Date: 12/27/15 - 12:07 PM * * @author Jeroen Meulemeester */ @RunWith(Parameterized.class) public class OrcsTest extends WeatherObserverTest { @Parameterized.Parameters public static Collection data() { final ArrayList testData = new ArrayList<>(); testData.add(new Object[]{WeatherType.SUNNY, "The sun hurts the orcs' eyes."}); testData.add(new Object[]{WeatherType.RAINY, "The orcs are dripping wet."}); testData.add(new Object[]{WeatherType.WINDY, "The orc smell almost vanishes in the wind."}); testData.add(new Object[]{WeatherType.COLD, "The orcs are freezing cold."}); return testData; } /** * Create a new test with the given weather and expected response * * @param weather The weather that should be unleashed on the observer * @param response The expected response from the observer */ public OrcsTest(final WeatherType weather, final String response) { super(weather, response, Orcs::new); } } java-design-patterns-1.9.0/observer/src/test/java/com/iluwatar/observer/StdOutTest.java000066400000000000000000000023551264154357600312710ustar00rootroot00000000000000package com.iluwatar.observer; import org.junit.After; import org.junit.Before; import java.io.PrintStream; import static org.mockito.Mockito.mock; /** * Date: 12/27/15 - 12:16 PM * * @author Jeroen Meulemeester */ public abstract class StdOutTest { /** * The mocked standard out {@link PrintStream}, required since changes in the weather doesn't has * any influence on any other accessible objects, except for writing to std-out using {@link * System#out} */ private final PrintStream stdOutMock = mock(PrintStream.class); /** * Keep the original std-out so it can be restored after the test */ private final PrintStream stdOutOrig = System.out; /** * Inject the mocked std-out {@link PrintStream} into the {@link System} class before each test */ @Before public void setUp() { System.setOut(this.stdOutMock); } /** * Removed the mocked std-out {@link PrintStream} again from the {@link System} class */ @After public void tearDown() { System.setOut(this.stdOutOrig); } /** * Get the mocked stdOut {@link PrintStream} * * @return The stdOut print stream mock, renewed before each test */ protected final PrintStream getStdOutMock() { return this.stdOutMock; } } java-design-patterns-1.9.0/observer/src/test/java/com/iluwatar/observer/WeatherObserverTest.java000066400000000000000000000027341264154357600331570ustar00rootroot00000000000000package com.iluwatar.observer; import org.junit.Test; import java.util.function.Supplier; import static org.mockito.Mockito.verify; import static org.mockito.Mockito.verifyNoMoreInteractions; import static org.mockito.Mockito.verifyZeroInteractions; /** * Date: 12/27/15 - 11:44 AM * * @author Jeroen Meulemeester */ public abstract class WeatherObserverTest extends StdOutTest { /** * The observer instance factory */ private final Supplier factory; /** * The weather type currently tested */ private final WeatherType weather; /** * The expected response from the observer */ private final String response; /** * Create a new test instance using the given parameters * * @param weather The weather currently being tested * @param response The expected response from the observer * @param factory The factory, used to create an instance of the tested observer */ WeatherObserverTest(final WeatherType weather, final String response, final Supplier factory) { this.weather = weather; this.response = response; this.factory = factory; } /** * Verify if the weather has the expected influence on the observer */ @Test public void testObserver() { final O observer = this.factory.get(); verifyZeroInteractions(getStdOutMock()); observer.update(this.weather); verify(getStdOutMock()).println(this.response); verifyNoMoreInteractions(getStdOutMock()); } }java-design-patterns-1.9.0/observer/src/test/java/com/iluwatar/observer/WeatherTest.java000066400000000000000000000033741264154357600314500ustar00rootroot00000000000000package com.iluwatar.observer; import org.junit.Test; import org.mockito.InOrder; import static org.mockito.Mockito.inOrder; import static org.mockito.Mockito.mock; import static org.mockito.Mockito.verify; import static org.mockito.Mockito.verifyNoMoreInteractions; import static org.mockito.Mockito.verifyZeroInteractions; /** * Date: 12/27/15 - 11:08 AM * * @author Jeroen Meulemeester */ public class WeatherTest extends StdOutTest { /** * Add a {@link WeatherObserver}, verify if it gets notified of a weather change, remove the * observer again and verify that there are no more notifications. */ @Test public void testAddRemoveObserver() { final WeatherObserver observer = mock(WeatherObserver.class); final Weather weather = new Weather(); weather.addObserver(observer); verifyZeroInteractions(observer); weather.timePasses(); verify(getStdOutMock()).println("The weather changed to rainy."); verify(observer).update(WeatherType.RAINY); weather.removeObserver(observer); weather.timePasses(); verify(getStdOutMock()).println("The weather changed to windy."); verifyNoMoreInteractions(observer, getStdOutMock()); } /** * Verify if the weather passes in the order of the {@link WeatherType}s */ @Test public void testTimePasses() { final WeatherObserver observer = mock(WeatherObserver.class); final Weather weather = new Weather(); weather.addObserver(observer); final InOrder inOrder = inOrder(observer, getStdOutMock()); final WeatherType[] weatherTypes = WeatherType.values(); for (int i = 1; i < 20; i++) { weather.timePasses(); inOrder.verify(observer).update(weatherTypes[i % weatherTypes.length]); } verifyNoMoreInteractions(observer); } }java-design-patterns-1.9.0/observer/src/test/java/com/iluwatar/observer/generic/000077500000000000000000000000001264154357600277535ustar00rootroot00000000000000java-design-patterns-1.9.0/observer/src/test/java/com/iluwatar/observer/generic/GHobbitsTest.java000066400000000000000000000025341264154357600331630ustar00rootroot00000000000000package com.iluwatar.observer.generic; import com.iluwatar.observer.Hobbits; import com.iluwatar.observer.WeatherObserverTest; import com.iluwatar.observer.WeatherType; import org.junit.runner.RunWith; import org.junit.runners.Parameterized; import java.util.ArrayList; import java.util.Collection; /** * Date: 12/27/15 - 12:07 PM * * @author Jeroen Meulemeester */ @RunWith(Parameterized.class) public class GHobbitsTest extends ObserverTest { @Parameterized.Parameters public static Collection data() { final ArrayList testData = new ArrayList<>(); testData.add(new Object[]{WeatherType.SUNNY, "The happy hobbits bade in the warm sun."}); testData.add(new Object[]{WeatherType.RAINY, "The hobbits look for cover from the rain."}); testData.add(new Object[]{WeatherType.WINDY, "The hobbits hold their hats tightly in the windy weather."}); testData.add(new Object[]{WeatherType.COLD, "The hobbits are shivering in the cold weather."}); return testData; } /** * Create a new test with the given weather and expected response * * @param weather The weather that should be unleashed on the observer * @param response The expected response from the observer */ public GHobbitsTest(final WeatherType weather, final String response) { super(weather, response, GHobbits::new); } } java-design-patterns-1.9.0/observer/src/test/java/com/iluwatar/observer/generic/GWeatherTest.java000066400000000000000000000035611264154357600331710ustar00rootroot00000000000000package com.iluwatar.observer.generic; import com.iluwatar.observer.StdOutTest; import com.iluwatar.observer.WeatherObserver; import com.iluwatar.observer.WeatherType; import org.junit.Test; import org.mockito.InOrder; import static org.mockito.Mockito.inOrder; import static org.mockito.Mockito.mock; import static org.mockito.Mockito.verify; import static org.mockito.Mockito.verifyNoMoreInteractions; import static org.mockito.Mockito.verifyZeroInteractions; /** * Date: 12/27/15 - 11:08 AM * * @author Jeroen Meulemeester */ public class GWeatherTest extends StdOutTest { /** * Add a {@link WeatherObserver}, verify if it gets notified of a weather change, remove the * observer again and verify that there are no more notifications. */ @Test public void testAddRemoveObserver() { final Race observer = mock(Race.class); final GWeather weather = new GWeather(); weather.addObserver(observer); verifyZeroInteractions(observer); weather.timePasses(); verify(getStdOutMock()).println("The weather changed to rainy."); verify(observer).update(weather, WeatherType.RAINY); weather.removeObserver(observer); weather.timePasses(); verify(getStdOutMock()).println("The weather changed to windy."); verifyNoMoreInteractions(observer, getStdOutMock()); } /** * Verify if the weather passes in the order of the {@link WeatherType}s */ @Test public void testTimePasses() { final Race observer = mock(Race.class); final GWeather weather = new GWeather(); weather.addObserver(observer); final InOrder inOrder = inOrder(observer, getStdOutMock()); final WeatherType[] weatherTypes = WeatherType.values(); for (int i = 1; i < 20; i++) { weather.timePasses(); inOrder.verify(observer).update(weather, weatherTypes[i % weatherTypes.length]); } verifyNoMoreInteractions(observer); } }java-design-patterns-1.9.0/observer/src/test/java/com/iluwatar/observer/generic/ObserverTest.java000066400000000000000000000030511264154357600332440ustar00rootroot00000000000000package com.iluwatar.observer.generic; import com.iluwatar.observer.StdOutTest; import com.iluwatar.observer.WeatherType; import org.junit.Test; import java.util.function.Supplier; import static org.mockito.Mockito.verify; import static org.mockito.Mockito.verifyNoMoreInteractions; import static org.mockito.Mockito.verifyZeroInteractions; /** * Date: 12/27/15 - 11:44 AM * * @author Jeroen Meulemeester */ public abstract class ObserverTest extends StdOutTest { /** * The observer instance factory */ private final Supplier factory; /** * The weather type currently tested */ private final WeatherType weather; /** * The expected response from the observer */ private final String response; /** * Create a new test instance using the given parameters * * @param weather The weather currently being tested * @param response The expected response from the observer * @param factory The factory, used to create an instance of the tested observer */ ObserverTest(final WeatherType weather, final String response, final Supplier factory) { this.weather = weather; this.response = response; this.factory = factory; } /** * Verify if the weather has the expected influence on the observer */ @Test public void testObserver() { final O observer = this.factory.get(); verifyZeroInteractions(getStdOutMock()); observer.update(null, this.weather); verify(getStdOutMock()).println(this.response); verifyNoMoreInteractions(getStdOutMock()); } }java-design-patterns-1.9.0/observer/src/test/java/com/iluwatar/observer/generic/OrcsTest.java000066400000000000000000000022731264154357600323700ustar00rootroot00000000000000package com.iluwatar.observer.generic; import com.iluwatar.observer.WeatherType; import org.junit.runner.RunWith; import org.junit.runners.Parameterized; import java.util.ArrayList; import java.util.Collection; /** * Date: 12/27/15 - 12:07 PM * * @author Jeroen Meulemeester */ @RunWith(Parameterized.class) public class OrcsTest extends ObserverTest { @Parameterized.Parameters public static Collection data() { final ArrayList testData = new ArrayList<>(); testData.add(new Object[]{WeatherType.SUNNY, "The sun hurts the orcs' eyes."}); testData.add(new Object[]{WeatherType.RAINY, "The orcs are dripping wet."}); testData.add(new Object[]{WeatherType.WINDY, "The orc smell almost vanishes in the wind."}); testData.add(new Object[]{WeatherType.COLD, "The orcs are freezing cold."}); return testData; } /** * Create a new test with the given weather and expected response * * @param weather The weather that should be unleashed on the observer * @param response The expected response from the observer */ public OrcsTest(final WeatherType weather, final String response) { super(weather, response, GOrcs::new); } } java-design-patterns-1.9.0/poison-pill/000077500000000000000000000000001264154357600200315ustar00rootroot00000000000000java-design-patterns-1.9.0/poison-pill/etc/000077500000000000000000000000001264154357600206045ustar00rootroot00000000000000java-design-patterns-1.9.0/poison-pill/etc/poison-pill.png000066400000000000000000000367311264154357600235710ustar00rootroot00000000000000PNG  IHDR@ac=IDATx_՝wUȉ#` uF(  xT@xG&&BGA~`Qal 3%nQg,06ȏӲ(ݎn߾m# :cwX)Imukq/Y⹊XA~b%}|sm%RZ߄ `!AM2n&ֲނ- ?@bY}Zlٶ{ܝxA~D 3gm1nikVVbېA~Dm%ugswm&;{F=wuݑ PȏLT06ȏL<* L< # `!ģ ?@006ȏL<* L< #t_\ydz_~jmĴ(trA~k?+^s1)1=ux(wA~hSu ~򵳯؉R=º>4/]z7H}k3Ν;( lOVwbIIXHXal eSgO~y;o+x[09}5ҭ -GG7|i#T_'f{nm]Kg 1|h06ȏL/ >[{NX6G~t|^ӿG7w[F>[Zj9!ܶ6,¤,L>MUY1~Wh;W>H3dң8xW|2-B1+^&vv9+&ĬgzA #,?sx%GxoJ}g=uҞU n\/70 0Ias债włCpϲ]yMn-"KcrӂPt'EM970wML<@u es|㟎S7=w_|oԡۿ~Sϝ;(\o 8 >AqiE' QS];>|.>i餭0ox ?@Js(i:ʙ w x)yLǗh⥓N+оtɭN[lViط\&݈&&:ȏL}k[O.h΁ǟ9.roX!}Ay?Pz.Uf.ҽ2ĞXˠ{E1#51A~4{t;ޡqOk;p2n4rY< Ѽ&^|'CwWO.ŕƥcV ~yk~x0O&1o\Q4Mk_tSPGA?9ptx_ߵK?+Mje򕿋k'_wn/YwRq܋KQxҘiҖZ*++r7_PGAOlN'g߾d-صLiQv𥨢DJ syhaKܥ `!(w﫹{C36-uW&wє돛oGG7(al x ?@006ȏL<* L< # `!ģ ?@006ȏLDckvGdO-06ȏ8َɘzajl6[)}? !h4:olW>eKCxGA\^w+3ʈ{cyA~elMWW`!hTn@OfN8}7׾O*uG.@C!?@2Q ?@006ȏL<* L< # `!ģ ?@006ȏIDMݑ P0#(:X ?@006ȏL<* L< # ~a־,$&ƗMZA~2¾O\~7j&BP#Q ?@ N3~/M>(L< # xSVtZgg.L< #5M|Uʧ`0@~ Mf|!]uz6|SXN)5ֶqqK-L|f*ɵ1 n&Y'qo6ֺ)t]kT( 78jz0 &>0nht:hvn(\ŖW^1[Io<"L<#f/G/l+ls-eS&>]^+&-}g[2ȏL?xSt[^[lr?m7[Rc' lg|zn&Bi2͜YT1:i}nClsw+R?v}`plf>&#߷yiڷE%n#&BW"tt*e16ȏUT06ȏL<* L< # `!ģ ?@006ȏIDMݑ P0#(:X ?@006ȏL<* L< # ?vj&Bogy[WL#Q ?@Ԣ[IT06ȏL<* L< #iwyWy]U6CdL< #m Wv7=? &[eLyMU^lm0@~8|,>~61!fSY=ez\6NokL>4K:3vp@~L7+gv]N1+ u3LnWUwոTk,\bR- ?@lu ?3f\pu}T:.q[vG̭}L<@; 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If you use Poison Pill as the termination signal then Producer is responsible to notify * Consumer that the exchange is over and reject any further messages. The Consumer receiving Poison * Pill will stop reading messages from the queue. You must also ensure that the Poison Pill will be * the last message that will be read from the queue (if you have prioritized queue then this can be * tricky). *

* In simple cases the Poison Pill can be just a null-reference, but holding a unique separate * shared object-marker (with name "Poison" or "Poison Pill") is more clear and self describing. * */ public class App { /** * Program entry point * * @param args command line args */ public static void main(String[] args) { MessageQueue queue = new SimpleMessageQueue(10000); final Producer producer = new Producer("PRODUCER_1", queue); final Consumer consumer = new Consumer("CONSUMER_1", queue); new Thread() { @Override public void run() { consumer.consume(); } }.start(); new Thread() { @Override public void run() { producer.send("hand shake"); producer.send("some very important information"); producer.send("bye!"); producer.stop(); } }.start(); } } java-design-patterns-1.9.0/poison-pill/src/main/java/com/iluwatar/poison/pill/Consumer.java000066400000000000000000000020021264154357600317720ustar00rootroot00000000000000package com.iluwatar.poison.pill; import com.iluwatar.poison.pill.Message.Headers; /** * Class responsible for receiving and handling submitted to the queue messages */ public class Consumer { private final MqSubscribePoint queue; private final String name; public Consumer(String name, MqSubscribePoint queue) { this.name = name; this.queue = queue; } /** * Consume message */ public void consume() { while (true) { Message msg; try { msg = queue.take(); if (Message.POISON_PILL.equals(msg)) { System.out.println(String.format("Consumer %s receive request to terminate.", name)); break; } } catch (InterruptedException e) { // allow thread to exit System.err.println(e); return; } String sender = msg.getHeader(Headers.SENDER); String body = msg.getBody(); System.out.println(String.format("Message [%s] from [%s] received by [%s]", body, sender, name)); } } } java-design-patterns-1.9.0/poison-pill/src/main/java/com/iluwatar/poison/pill/Message.java000066400000000000000000000020431264154357600315700ustar00rootroot00000000000000package com.iluwatar.poison.pill; import java.util.Map; /** * Interface that implements the Message pattern and represents an inbound or outbound message as * part of an {@link Producer}-{@link Consumer} exchange. */ public interface Message { Message POISON_PILL = new Message() { @Override public void addHeader(Headers header, String value) { throw poison(); } @Override public String getHeader(Headers header) { throw poison(); } @Override public Map getHeaders() { throw poison(); } @Override public void setBody(String body) { throw poison(); } @Override public String getBody() { throw poison(); } private RuntimeException poison() { return new UnsupportedOperationException("Poison"); } }; public enum Headers { DATE, SENDER } void addHeader(Headers header, String value); String getHeader(Headers header); Map getHeaders(); void setBody(String body); String getBody(); } java-design-patterns-1.9.0/poison-pill/src/main/java/com/iluwatar/poison/pill/MessageQueue.java000066400000000000000000000003301264154357600325720ustar00rootroot00000000000000package com.iluwatar.poison.pill; /** * Represents abstraction of channel (or pipe) that bounds {@link Producer} and {@link Consumer} */ public interface MessageQueue extends MqPublishPoint, MqSubscribePoint { } java-design-patterns-1.9.0/poison-pill/src/main/java/com/iluwatar/poison/pill/MqPublishPoint.java000066400000000000000000000002651264154357600331260ustar00rootroot00000000000000package com.iluwatar.poison.pill; /** * Endpoint to publish {@link Message} to queue */ public interface MqPublishPoint { void put(Message msg) throws InterruptedException; } java-design-patterns-1.9.0/poison-pill/src/main/java/com/iluwatar/poison/pill/MqSubscribePoint.java000066400000000000000000000002631264154357600334370ustar00rootroot00000000000000package com.iluwatar.poison.pill; /** * Endpoint to retrieve {@link Message} from queue */ public interface MqSubscribePoint { Message take() throws InterruptedException; } java-design-patterns-1.9.0/poison-pill/src/main/java/com/iluwatar/poison/pill/Producer.java000066400000000000000000000024411264154357600317710ustar00rootroot00000000000000package com.iluwatar.poison.pill; import java.util.Date; import com.iluwatar.poison.pill.Message.Headers; /** * Class responsible for producing unit of work that can be expressed as message and submitted to * queue */ public class Producer { private final MqPublishPoint queue; private final String name; private boolean isStopped; /** * Constructor */ public Producer(String name, MqPublishPoint queue) { this.name = name; this.queue = queue; this.isStopped = false; } /** * Send message to queue */ public void send(String body) { if (isStopped) { throw new IllegalStateException(String.format( "Producer %s was stopped and fail to deliver requested message [%s].", body, name)); } Message msg = new SimpleMessage(); msg.addHeader(Headers.DATE, new Date().toString()); msg.addHeader(Headers.SENDER, name); msg.setBody(body); try { queue.put(msg); } catch (InterruptedException e) { // allow thread to exit System.err.println(e); } } /** * Stop system by sending poison pill */ public void stop() { isStopped = true; try { queue.put(Message.POISON_PILL); } catch (InterruptedException e) { // allow thread to exit System.err.println(e); } } } java-design-patterns-1.9.0/poison-pill/src/main/java/com/iluwatar/poison/pill/SimpleMessage.java000066400000000000000000000013451264154357600327460ustar00rootroot00000000000000package com.iluwatar.poison.pill; import java.util.Collections; import java.util.HashMap; import java.util.Map; /** * {@link Message} basic implementation */ public class SimpleMessage implements Message { private Map headers = new HashMap<>(); private String body; @Override public void addHeader(Headers header, String value) { headers.put(header, value); } @Override public String getHeader(Headers header) { return headers.get(header); } @Override public Map getHeaders() { return Collections.unmodifiableMap(headers); } @Override public void setBody(String body) { this.body = body; } @Override public String getBody() { return body; } } SimpleMessageQueue.java000066400000000000000000000010701264154357600336670ustar00rootroot00000000000000java-design-patterns-1.9.0/poison-pill/src/main/java/com/iluwatar/poison/pillpackage com.iluwatar.poison.pill; import java.util.concurrent.ArrayBlockingQueue; import java.util.concurrent.BlockingQueue; /** * Bounded blocking queue wrapper */ public class SimpleMessageQueue implements MessageQueue { private final BlockingQueue queue; public SimpleMessageQueue(int bound) { queue = new ArrayBlockingQueue(bound); } @Override public void put(Message msg) throws InterruptedException { queue.put(msg); } @Override public Message take() throws InterruptedException { return queue.take(); } } java-design-patterns-1.9.0/poison-pill/src/test/000077500000000000000000000000001264154357600215775ustar00rootroot00000000000000java-design-patterns-1.9.0/poison-pill/src/test/java/000077500000000000000000000000001264154357600225205ustar00rootroot00000000000000java-design-patterns-1.9.0/poison-pill/src/test/java/com/000077500000000000000000000000001264154357600232765ustar00rootroot00000000000000java-design-patterns-1.9.0/poison-pill/src/test/java/com/iluwatar/000077500000000000000000000000001264154357600251265ustar00rootroot00000000000000java-design-patterns-1.9.0/poison-pill/src/test/java/com/iluwatar/poison/000077500000000000000000000000001264154357600264355ustar00rootroot00000000000000java-design-patterns-1.9.0/poison-pill/src/test/java/com/iluwatar/poison/pill/000077500000000000000000000000001264154357600273755ustar00rootroot00000000000000java-design-patterns-1.9.0/poison-pill/src/test/java/com/iluwatar/poison/pill/AppTest.java000066400000000000000000000003071264154357600316200ustar00rootroot00000000000000package com.iluwatar.poison.pill; import org.junit.Test; /** * * Application test * */ public class AppTest { @Test public void test() { String[] args = {}; App.main(args); } } java-design-patterns-1.9.0/poison-pill/src/test/java/com/iluwatar/poison/pill/ConsumerTest.java000066400000000000000000000031511264154357600326730ustar00rootroot00000000000000package com.iluwatar.poison.pill; import org.junit.Test; import org.mockito.InOrder; import java.time.LocalDateTime; import static org.mockito.Mockito.inOrder; /** * Date: 12/27/15 - 9:45 PM * * @author Jeroen Meulemeester */ public class ConsumerTest extends StdOutTest { @Test public void testConsume() throws Exception { final Message[] messages = new Message[]{ createMessage("you", "Hello!"), createMessage("me", "Hi!"), Message.POISON_PILL, createMessage("late_for_the_party", "Hello? Anyone here?"), }; final MessageQueue queue = new SimpleMessageQueue(messages.length); for (final Message message : messages) { queue.put(message); } new Consumer("NSA", queue).consume(); final InOrder inOrder = inOrder(getStdOutMock()); inOrder.verify(getStdOutMock()).println("Message [Hello!] from [you] received by [NSA]"); inOrder.verify(getStdOutMock()).println("Message [Hi!] from [me] received by [NSA]"); inOrder.verify(getStdOutMock()).println("Consumer NSA receive request to terminate."); inOrder.verifyNoMoreInteractions(); } /** * Create a new message from the given sender with the given message body * * @param sender The sender's name * @param message The message body * @return The message instance */ private static Message createMessage(final String sender, final String message) { final SimpleMessage msg = new SimpleMessage(); msg.addHeader(Message.Headers.SENDER, sender); msg.addHeader(Message.Headers.DATE, LocalDateTime.now().toString()); msg.setBody(message); return msg; } }java-design-patterns-1.9.0/poison-pill/src/test/java/com/iluwatar/poison/pill/PoisonMessageTest.java000066400000000000000000000020011264154357600336450ustar00rootroot00000000000000package com.iluwatar.poison.pill; import org.junit.Test; import static com.iluwatar.poison.pill.Message.Headers; import static com.iluwatar.poison.pill.Message.POISON_PILL; /** * Date: 12/27/15 - 10:30 PM * * @author Jeroen Meulemeester */ public class PoisonMessageTest { @Test(expected = UnsupportedOperationException.class) public void testAddHeader() throws Exception { POISON_PILL.addHeader(Headers.SENDER, "sender"); } @Test(expected = UnsupportedOperationException.class) public void testGetHeader() throws Exception { POISON_PILL.getHeader(Headers.SENDER); } @Test(expected = UnsupportedOperationException.class) public void testGetHeaders() throws Exception { POISON_PILL.getHeaders(); } @Test(expected = UnsupportedOperationException.class) public void testSetBody() throws Exception { POISON_PILL.setBody("Test message."); } @Test(expected = UnsupportedOperationException.class) public void testGetBody() throws Exception { POISON_PILL.getBody(); } } java-design-patterns-1.9.0/poison-pill/src/test/java/com/iluwatar/poison/pill/ProducerTest.java000066400000000000000000000037431264154357600326720ustar00rootroot00000000000000package com.iluwatar.poison.pill; import org.junit.Test; import org.mockito.ArgumentCaptor; import static org.junit.Assert.assertEquals; import static org.junit.Assert.assertNotNull; import static org.junit.Assert.fail; import static org.mockito.Matchers.eq; import static org.mockito.Mockito.mock; import static org.mockito.Mockito.verify; import static org.mockito.Mockito.verifyNoMoreInteractions; import static org.mockito.Mockito.verifyZeroInteractions; /** * Date: 12/27/15 - 10:32 PM * * @author Jeroen Meulemeester */ public class ProducerTest { @Test public void testSend() throws Exception { final MqPublishPoint publishPoint = mock(MqPublishPoint.class); final Producer producer = new Producer("producer", publishPoint); verifyZeroInteractions(publishPoint); producer.send("Hello!"); final ArgumentCaptor messageCaptor = ArgumentCaptor.forClass(Message.class); verify(publishPoint).put(messageCaptor.capture()); final Message message = messageCaptor.getValue(); assertNotNull(message); assertEquals("producer", message.getHeader(Message.Headers.SENDER)); assertNotNull(message.getHeader(Message.Headers.DATE)); assertEquals("Hello!", message.getBody()); verifyNoMoreInteractions(publishPoint); } @Test public void testStop() throws Exception { final MqPublishPoint publishPoint = mock(MqPublishPoint.class); final Producer producer = new Producer("producer", publishPoint); verifyZeroInteractions(publishPoint); producer.stop(); verify(publishPoint).put(eq(Message.POISON_PILL)); try { producer.send("Hello!"); fail("Expected 'IllegalStateException' at this point, since the producer has stopped!"); } catch (IllegalStateException e) { assertNotNull(e); assertNotNull(e.getMessage()); assertEquals("Producer Hello! was stopped and fail to deliver requested message [producer].", e.getMessage()); } verifyNoMoreInteractions(publishPoint); } } java-design-patterns-1.9.0/poison-pill/src/test/java/com/iluwatar/poison/pill/SimpleMessageTest.java000066400000000000000000000021201264154357600336310ustar00rootroot00000000000000package com.iluwatar.poison.pill; import org.junit.Test; import java.util.Map; import static org.junit.Assert.assertEquals; import static org.junit.Assert.assertFalse; import static org.junit.Assert.assertNotNull; import static org.junit.Assert.assertTrue; /** * Date: 12/27/15 - 10:25 PM * * @author Jeroen Meulemeester */ public class SimpleMessageTest { @Test public void testGetHeaders() { final SimpleMessage message = new SimpleMessage(); assertNotNull(message.getHeaders()); assertTrue(message.getHeaders().isEmpty()); final String senderName = "test"; message.addHeader(Message.Headers.SENDER, senderName); assertNotNull(message.getHeaders()); assertFalse(message.getHeaders().isEmpty()); assertEquals(senderName, message.getHeaders().get(Message.Headers.SENDER)); } @Test(expected = UnsupportedOperationException.class) public void testUnModifiableHeaders() { final SimpleMessage message = new SimpleMessage(); final Map headers = message.getHeaders(); headers.put(Message.Headers.SENDER, "test"); } }java-design-patterns-1.9.0/poison-pill/src/test/java/com/iluwatar/poison/pill/StdOutTest.java000066400000000000000000000023131264154357600323210ustar00rootroot00000000000000package com.iluwatar.poison.pill; import org.junit.After; import org.junit.Before; import java.io.PrintStream; import static org.mockito.Mockito.mock; /** * Date: 12/10/15 - 8:37 PM * * @author Jeroen Meulemeester */ public abstract class StdOutTest { /** * The mocked standard out {@link PrintStream}, required since some actions don't have any * influence on accessible objects, except for writing to std-out using {@link System#out} */ private final PrintStream stdOutMock = mock(PrintStream.class); /** * Keep the original std-out so it can be restored after the test */ private final PrintStream stdOutOrig = System.out; /** * Inject the mocked std-out {@link PrintStream} into the {@link System} class before each test */ @Before public void setUp() { System.setOut(this.stdOutMock); } /** * Removed the mocked std-out {@link PrintStream} again from the {@link System} class */ @After public void tearDown() { System.setOut(this.stdOutOrig); } /** * Get the mocked stdOut {@link PrintStream} * * @return The stdOut print stream mock, renewed before each test */ final PrintStream getStdOutMock() { return this.stdOutMock; } } java-design-patterns-1.9.0/pom.xml000066400000000000000000000246341264154357600171120ustar00rootroot00000000000000 4.0.0 com.iluwatar java-design-patterns 1.9.0 pom UTF-8 5.0.1.Final 4.1.7.RELEASE 1.9.0.RELEASE 1.4.188 4.12 3.0 4.0.0 0.7.2.201409121644 1.4 2.15.3 1.2.17 18.0 1.14.0 abstract-factory builder factory-method prototype singleton adapter bridge composite dao decorator facade flyweight proxy chain command interpreter iterator mediator memento model-view-presenter observer state strategy template-method visitor double-checked-locking servant service-locator null-object event-aggregator callback execute-around property intercepting-filter producer-consumer poison-pill lazy-loading service-layer specification tolerant-reader model-view-controller flux double-dispatch multiton resource-acquisition-is-initialization thread-pool twin private-class-data object-pool dependency-injection naked-objects front-controller repository async-method-invocation monostate step-builder business-delegate half-sync-half-async layers message-channel fluentinterface reactor caching publish-subscribe delegation org.hibernate hibernate-core ${hibernate.version} org.hibernate hibernate-entitymanager ${hibernate.version} org.springframework spring-test ${spring.version} org.springframework.data spring-data-jpa ${spring-data.version} com.h2database h2 ${h2.version} commons-dbcp commons-dbcp ${commons-dbcp.version} org.apache.camel camel-core ${camel.version} org.apache.camel camel-stream ${camel.version} junit junit ${junit.version} test org.mockito mockito-core 1.10.19 test log4j log4j ${log4j.version} com.google.guava guava ${guava.version} com.github.stefanbirkner system-rules ${systemrules.version} test org.eclipse.m2e lifecycle-mapping 1.0.0 org.jacoco jacoco-maven-plugin [0.6.2,) prepare-agent org.apache.maven.plugins maven-compiler-plugin ${compiler.version} 1.8 1.8 org.eluder.coveralls coveralls-maven-plugin ${coveralls.version} jb6wYzxkVvjolD6qOWpzWdcWBzYk2fAmF org.jacoco jacoco-maven-plugin ${jacoco.version} domainapp/dom/modules/simple/QSimpleObject.class prepare-agent prepare-agent org.apache.maven.plugins maven-checkstyle-plugin 2.17 validate check validate checkstyle.xml checkstyle-suppressions.xml UTF-8 true true true org.jacoco jacoco-maven-plugin 0.7.5.201505241946 prepare-agent report prepare-package report org.apache.maven.plugins maven-surefire-plugin 2.18.1 org.apache.maven.surefire surefire-junit47 2.18.1 -Xmx1024M ${argLine} org.apache.maven.plugins maven-pmd-plugin 3.6 true 5 true check exclude-pmd.properties org.apache.maven.plugins maven-pmd-plugin 3.6 java-design-patterns-1.9.0/private-class-data/000077500000000000000000000000001264154357600212505ustar00rootroot00000000000000java-design-patterns-1.9.0/private-class-data/etc/000077500000000000000000000000001264154357600220235ustar00rootroot00000000000000java-design-patterns-1.9.0/private-class-data/etc/private-class-data.png000066400000000000000000000250471264154357600262250ustar00rootroot00000000000000PNG  IHDR2<)IDATxE/1HD 71i j9JHICJ᤼*6T*`ߵ7ZixmĊF $}SP%'$`bH /x/3;_wvg_{|wf=3ݹt&S/A.` Aay%_@Չg奅2Z`&Ò1GTq~V,\a\sX" Xe`( `;%0r;lknyU~Zr9 ,+誢XFEd, DK XRUEXʙh#exįew6o%ZWǃTZQgh%m;Kt]Q),=ȹe7FER+?q,{Oպ/KtQEKޘ{ҒB ỊKI!=r۱DA{F[KՋ?02`Y^iRv*FDAQUEX|H@.eAc1dgN/lTmQZQ_,ˡϖ(観RaN EYԨ/o*XeI0x`8\K|,}2DQw.KDaK߹ ,,}2D,_}#_ɵlglOSG..AasIK_7A2},8GXҾ+WN̛Oտx}]xzKU?U#l#D8₨wZ~_@Z[B cn؅ޓ{νV^ ?<]ۧxb\l1>H銣v,u6,Pvr߼h//:3l<{ly*NͦX$ ?$r2 R92 x+ Xy;zUa,7޾eW>[~I]= oaiC1jJ:)y'%*ɶLi O\"K&J(V1#yZeҁs 5%)䁍EW{m\re6_|QٕLh>#OJ(-hւ(?mB],+4,I`RĬO+ׄT[˯ܼAڲ,xo62 ~KdS㓸T8'mre R?NLRa,͚Ў*0Aeۇ;?s_z{rg?-;b?<+ǥN,\-XNWz[Zjj|{_w{O{ zێ`=#}nD6-XNWbܡ`?igK uԄVTd쑋۸O|g}{'^ZP2 ߿q֭z|˶ɖF 8 ,'uv^ж+~v#B l _ lK߹ ,,}2DQw.KDaK߹ ,*,GdtՌckM9j˩e]I ˉT`S87gt,gu%K1J]IYztav6.G<餸t\eaG|A WvR2вԏ -(%b(STohG+:u!suu:s9,C-+LXjY.<:FRAP◃p0GW(ip\T^f@ +0[xq$TvLͦ&E5Ee]yç87E/~J!qGXՐO+Ǘ~/9K"̲´'&Xe`( `;%0\sX" Xe`( ;]ЁʱD- ů*8:Qw.KDaK߹ ,,}rUB ]>meAk9%0aV6U,Zd<͠/%AS,/`9Dä?c_;Ҝˎ٤i9J۞i(/ws),CvKҎmt6gKɭ,IkQ-(i}߬eVO[ ?:%0j-?X=2%l-2"$ZTe!Tnb+{ww}EK5?lie~bs;*H 8yۍ.͗ZUjmL.͕8+,[ [?y)_5ĚXEW,&'敗ۺTA-g饋cwǮAQae]O?ilL#u⼗̛oI{˾Xr][z:ib <42 , X~[ڵ=qll^,my~zo5}H^޸ZM`prX8c7zf3+lceSI63;k&V{6˟%J-%+Lnb c)]X|>cc9zvu6K=lX]w9o|"eĕGUwfS|<.&3,:;E?H-\J? rskaIHYpĴ,SQw.KDaR[p{Θfij=IrX" oSyN$I%bKO`cyVsX" cF,r'p2AK?+ۅ30k"e`()+v'(ϫ9s"e`(ZK\Ii,E$`gO.# rZΝ@ L8]&ƶ`^K՝"hs 23j艵-N5<Qm <+^K;YF.acoy=AKdZeqbO,˺$7%~ "iw.ʭ,0G.׍Bt`ƛcT:Gҁ֩ uc9;w\ۦas,+0G.׍8mD l-{? ,}rXNʻ+H쌷|IoZOg.XeXNp'3\e1pDsX"Qw.KDaRwٕjQCje`( zXvL])Ļ`\¨g|! 7α=̐Uiݺ :Ђ,XN%˳D4ehZ^^n+4#ܣ ^/lc]}-Dze)7t foY,N!w1Tte7k9rlp'F3sGIWaY`dVܶқC?,h[*Ty,%]XUy,%]XUy,%]XUy,%]XUy,%]&t:>7 *UCXʋU4>it{UBT hAұ=yG%ԩ5[*TyHŝ@i-$/QMF* R*k{⸛e/Ns[cZE?Jڙ΁P`'pVVϬcc9zvu6Kk ݦ*>Z8$wi>Ny]>)<,]~@6rU?H1;?ԧ` -ֆÒב jTyH˶GUBXUy,%]XUy,%]XUy,%]XUyX3YM n`T 6gs'XiqrzX.Ù ƺ~7>vA;l0z_g,b46-3`H 6+r'{d#NΨ߉;$-ΞBu.Uf~ `"w2%J19́is*uF>Zh,۫`"wB,㦬ӱ8L8H)<ȝK2MD s{OM`"w<, K|I.=˧Eb)eoS . 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It reduces the number of class attributes by encapsulating them in single Data object. ![alt text](./etc/private-class-data.png "Private Class Data") **Applicability:** Use the Private Class Data pattern when * you want to prevent write access to class data members java-design-patterns-1.9.0/private-class-data/pom.xml000066400000000000000000000014011264154357600225610ustar00rootroot00000000000000 4.0.0 com.iluwatar java-design-patterns 1.9.0 private-class-data junit junit test org.mockito mockito-core test java-design-patterns-1.9.0/private-class-data/src/000077500000000000000000000000001264154357600220375ustar00rootroot00000000000000java-design-patterns-1.9.0/private-class-data/src/main/000077500000000000000000000000001264154357600227635ustar00rootroot00000000000000java-design-patterns-1.9.0/private-class-data/src/main/java/000077500000000000000000000000001264154357600237045ustar00rootroot00000000000000java-design-patterns-1.9.0/private-class-data/src/main/java/com/000077500000000000000000000000001264154357600244625ustar00rootroot00000000000000java-design-patterns-1.9.0/private-class-data/src/main/java/com/iluwatar/000077500000000000000000000000001264154357600263125ustar00rootroot00000000000000java-design-patterns-1.9.0/private-class-data/src/main/java/com/iluwatar/privateclassdata/000077500000000000000000000000001264154357600316445ustar00rootroot00000000000000java-design-patterns-1.9.0/private-class-data/src/main/java/com/iluwatar/privateclassdata/App.java000066400000000000000000000025361264154357600332350ustar00rootroot00000000000000package com.iluwatar.privateclassdata; /** * * The Private Class Data design pattern seeks to reduce exposure of attributes by limiting their * visibility. It reduces the number of class attributes by encapsulating them in single data * object. It allows the class designer to remove write privilege of attributes that are intended to * be set only during construction, even from methods of the target class. *

* In the example we have normal {@link Stew} class with some ingredients given in constructor. Then * we have methods to enumerate the ingredients and to taste the stew. The method for tasting the * stew alters the private members of the {@link Stew} class. * * The problem is solved with the Private Class Data pattern. We introduce {@link ImmutableStew} * class that contains {@link StewData}. The private data members of {@link Stew} are now in * {@link StewData} and cannot be altered by {@link ImmutableStew} methods. * */ public class App { /** * Program entry point * * @param args command line args */ public static void main(String[] args) { // stew is mutable Stew stew = new Stew(1, 2, 3, 4); stew.mix(); stew.taste(); stew.mix(); // immutable stew protected with Private Class Data pattern ImmutableStew immutableStew = new ImmutableStew(2, 4, 3, 6); immutableStew.mix(); } } ImmutableStew.java000066400000000000000000000012131264154357600352070ustar00rootroot00000000000000java-design-patterns-1.9.0/private-class-data/src/main/java/com/iluwatar/privateclassdatapackage com.iluwatar.privateclassdata; /** * * Immutable stew class, protected with Private Class Data pattern * */ public class ImmutableStew { private StewData data; public ImmutableStew(int numPotatoes, int numCarrots, int numMeat, int numPeppers) { data = new StewData(numPotatoes, numCarrots, numMeat, numPeppers); } /** * Mix the stew */ public void mix() { System.out.println(String.format( "Mixing the immutable stew we find: %d potatoes, %d carrots, %d meat and %d peppers", data.getNumPotatoes(), data.getNumCarrots(), data.getNumMeat(), data.getNumPeppers())); } } java-design-patterns-1.9.0/private-class-data/src/main/java/com/iluwatar/privateclassdata/Stew.java000066400000000000000000000020221264154357600334250ustar00rootroot00000000000000package com.iluwatar.privateclassdata; /** * * Mutable stew class * */ public class Stew { private int numPotatoes; private int numCarrots; private int numMeat; private int numPeppers; /** * Constructor */ public Stew(int numPotatoes, int numCarrots, int numMeat, int numPeppers) { this.numPotatoes = numPotatoes; this.numCarrots = numCarrots; this.numMeat = numMeat; this.numPeppers = numPeppers; } /** * Mix the stew */ public void mix() { System.out.println(String.format( "Mixing the stew we find: %d potatoes, %d carrots, %d meat and %d peppers", numPotatoes, numCarrots, numMeat, numPeppers)); } /** * Taste the stew */ public void taste() { System.out.println("Tasting the stew"); if (numPotatoes > 0) { numPotatoes--; } if (numCarrots > 0) { numCarrots--; } if (numMeat > 0) { numMeat--; } if (numPeppers > 0) { numPeppers--; } } } StewData.java000066400000000000000000000013241264154357600341440ustar00rootroot00000000000000java-design-patterns-1.9.0/private-class-data/src/main/java/com/iluwatar/privateclassdatapackage com.iluwatar.privateclassdata; /** * * Stew ingredients * */ public class StewData { private int numPotatoes; private int numCarrots; private int numMeat; private int numPeppers; /** * Constructor */ public StewData(int numPotatoes, int numCarrots, int numMeat, int numPeppers) { this.numPotatoes = numPotatoes; this.numCarrots = numCarrots; this.numMeat = numMeat; this.numPeppers = numPeppers; } public int getNumPotatoes() { return numPotatoes; } public int getNumCarrots() { return numCarrots; } public int getNumMeat() { return numMeat; } public int getNumPeppers() { return numPeppers; } } java-design-patterns-1.9.0/private-class-data/src/test/000077500000000000000000000000001264154357600230165ustar00rootroot00000000000000java-design-patterns-1.9.0/private-class-data/src/test/java/000077500000000000000000000000001264154357600237375ustar00rootroot00000000000000java-design-patterns-1.9.0/private-class-data/src/test/java/com/000077500000000000000000000000001264154357600245155ustar00rootroot00000000000000java-design-patterns-1.9.0/private-class-data/src/test/java/com/iluwatar/000077500000000000000000000000001264154357600263455ustar00rootroot00000000000000java-design-patterns-1.9.0/private-class-data/src/test/java/com/iluwatar/privateclassdata/000077500000000000000000000000001264154357600316775ustar00rootroot00000000000000AppTest.java000066400000000000000000000003141264154357600340410ustar00rootroot00000000000000java-design-patterns-1.9.0/private-class-data/src/test/java/com/iluwatar/privateclassdatapackage com.iluwatar.privateclassdata; import org.junit.Test; /** * * Application test * */ public class AppTest { @Test public void test() { String[] args = {}; App.main(args); } } ImmutableStewTest.java000066400000000000000000000024201264154357600361030ustar00rootroot00000000000000java-design-patterns-1.9.0/private-class-data/src/test/java/com/iluwatar/privateclassdatapackage com.iluwatar.privateclassdata; import org.junit.Test; import org.mockito.InOrder; import static org.mockito.Mockito.inOrder; import static org.mockito.Mockito.verify; /** * Date: 12/27/15 - 10:46 PM * * @author Jeroen Meulemeester */ public class ImmutableStewTest extends StdOutTest { /** * Verify if mixing the stew doesn't change the internal state */ @Test public void testMix() { final Stew stew = new Stew(1, 2, 3, 4); final String message = "Mixing the stew we find: 1 potatoes, 2 carrots, 3 meat and 4 peppers"; final InOrder inOrder = inOrder(getStdOutMock()); for (int i = 0; i < 20; i++) { stew.mix(); inOrder.verify(getStdOutMock()).println(message); } inOrder.verifyNoMoreInteractions(); } /** * Verify if tasting the stew actually removes one of each ingredient */ @Test public void testDrink() { final Stew stew = new Stew(1, 2, 3, 4); stew.mix(); verify(getStdOutMock()) .println("Mixing the stew we find: 1 potatoes, 2 carrots, 3 meat and 4 peppers"); stew.taste(); verify(getStdOutMock()).println("Tasting the stew"); stew.mix(); verify(getStdOutMock()) .println("Mixing the stew we find: 0 potatoes, 1 carrots, 2 meat and 3 peppers"); } }StdOutTest.java000066400000000000000000000023201264154357600345420ustar00rootroot00000000000000java-design-patterns-1.9.0/private-class-data/src/test/java/com/iluwatar/privateclassdatapackage com.iluwatar.privateclassdata; import org.junit.After; import org.junit.Before; import java.io.PrintStream; import static org.mockito.Mockito.mock; /** * Date: 12/10/15 - 8:37 PM * * @author Jeroen Meulemeester */ public abstract class StdOutTest { /** * The mocked standard out {@link PrintStream}, required since some actions don't have any * influence on accessible objects, except for writing to std-out using {@link System#out} */ private final PrintStream stdOutMock = mock(PrintStream.class); /** * Keep the original std-out so it can be restored after the test */ private final PrintStream stdOutOrig = System.out; /** * Inject the mocked std-out {@link PrintStream} into the {@link System} class before each test */ @Before public void setUp() { System.setOut(this.stdOutMock); } /** * Removed the mocked std-out {@link PrintStream} again from the {@link System} class */ @After public void tearDown() { System.setOut(this.stdOutOrig); } /** * Get the mocked stdOut {@link PrintStream} * * @return The stdOut print stream mock, renewed before each test */ final PrintStream getStdOutMock() { return this.stdOutMock; } } StewTest.java000066400000000000000000000014131264154357600342440ustar00rootroot00000000000000java-design-patterns-1.9.0/private-class-data/src/test/java/com/iluwatar/privateclassdatapackage com.iluwatar.privateclassdata; import org.junit.Test; import org.mockito.InOrder; import static org.mockito.Mockito.inOrder; /** * Date: 12/27/15 - 10:46 PM * * @author Jeroen Meulemeester */ public class StewTest extends StdOutTest { /** * Verify if mixing the stew doesn't change the internal state */ @Test public void testMix() { final ImmutableStew stew = new ImmutableStew(1, 2, 3, 4); 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import java.util.concurrent.ExecutorService; import java.util.concurrent.Executors; import java.util.concurrent.TimeUnit; /** * Producer Consumer Design pattern is a classic concurrency or threading pattern which reduces coupling between * Producer and Consumer by separating Identification of work with Execution of Work. *

* In producer consumer design pattern a shared queue is used to control the flow and this separation allows you to code * producer and consumer separately. It also addresses the issue of different timing require to produce item or * consuming item. by using producer consumer pattern both Producer and Consumer Thread can work with different speed. * */ public class App { /** * Program entry point * * @param args * command line args */ public static void main(String[] args) { ItemQueue queue = new ItemQueue(); ExecutorService executorService = Executors.newFixedThreadPool(5); for (int i = 0; i < 2; i++) { final Producer producer = new Producer("Producer_" + i, queue); executorService.submit(() -> { while (true) { producer.produce(); } }); } for (int i = 0; i < 3; i++) { final Consumer consumer = new Consumer("Consumer_" + i, queue); executorService.submit(() -> { while (true) { consumer.consume(); } }); } executorService.shutdown(); try { executorService.awaitTermination(10, TimeUnit.SECONDS); executorService.shutdownNow(); } catch (InterruptedException e) { System.out.println("Error waiting for ExecutorService shutdown"); } } } Consumer.java000066400000000000000000000011221264154357600343330ustar00rootroot00000000000000java-design-patterns-1.9.0/producer-consumer/src/main/java/com/iluwatar/producer/consumerpackage com.iluwatar.producer.consumer; /** * Class responsible for consume the {@link Item} produced by {@link Producer} */ public class Consumer { private final ItemQueue queue; private final String name; public Consumer(String name, ItemQueue queue) { this.name = name; this.queue = queue; } /** * Consume item from the queue */ public void consume() throws InterruptedException { Item item = queue.take(); System.out.println(String.format("Consumer [%s] consume item [%s] produced by [%s]", name, item.getId(), item.getProducer())); } } java-design-patterns-1.9.0/producer-consumer/src/main/java/com/iluwatar/producer/consumer/Item.java000066400000000000000000000006011264154357600335160ustar00rootroot00000000000000package com.iluwatar.producer.consumer; /** * Class take part of an {@link Producer}-{@link Consumer} exchange. */ public class Item { private String producer; private int id; public Item(String producer, int id) { this.id = id; this.producer = producer; } public int getId() { return id; } public String getProducer() { return producer; } } ItemQueue.java000066400000000000000000000007441264154357600344540ustar00rootroot00000000000000java-design-patterns-1.9.0/producer-consumer/src/main/java/com/iluwatar/producer/consumerpackage com.iluwatar.producer.consumer; import java.util.concurrent.LinkedBlockingQueue; /** * Class as a channel for {@link Producer}-{@link Consumer} exchange. */ public class ItemQueue { private LinkedBlockingQueue queue; public ItemQueue() { queue = new LinkedBlockingQueue(5); } public void put(Item item) throws InterruptedException { queue.put(item); } public Item take() throws InterruptedException { return queue.take(); } } Producer.java000066400000000000000000000012011264154357600343210ustar00rootroot00000000000000java-design-patterns-1.9.0/producer-consumer/src/main/java/com/iluwatar/producer/consumerpackage com.iluwatar.producer.consumer; import java.util.Random; /** * Class responsible for producing unit of work that can be expressed as {@link Item} and submitted * to queue */ public class Producer { private final ItemQueue queue; private final String name; private int itemId = 0; public Producer(String name, ItemQueue queue) { this.name = name; this.queue = queue; } /** * Put item in the queue */ public void produce() throws InterruptedException { Item item = new Item(name, itemId++); queue.put(item); Random random = new Random(); Thread.sleep(random.nextInt(2000)); } } java-design-patterns-1.9.0/producer-consumer/src/test/000077500000000000000000000000001264154357600230065ustar00rootroot00000000000000java-design-patterns-1.9.0/producer-consumer/src/test/java/000077500000000000000000000000001264154357600237275ustar00rootroot00000000000000java-design-patterns-1.9.0/producer-consumer/src/test/java/com/000077500000000000000000000000001264154357600245055ustar00rootroot00000000000000java-design-patterns-1.9.0/producer-consumer/src/test/java/com/iluwatar/000077500000000000000000000000001264154357600263355ustar00rootroot00000000000000java-design-patterns-1.9.0/producer-consumer/src/test/java/com/iluwatar/producer/000077500000000000000000000000001264154357600301605ustar00rootroot00000000000000java-design-patterns-1.9.0/producer-consumer/src/test/java/com/iluwatar/producer/consumer/000077500000000000000000000000001264154357600320135ustar00rootroot00000000000000AppTest.java000066400000000000000000000003371264154357600341620ustar00rootroot00000000000000java-design-patterns-1.9.0/producer-consumer/src/test/java/com/iluwatar/producer/consumerpackage com.iluwatar.producer.consumer; import org.junit.Test; /** * * Application test * */ public class AppTest { @Test public void test() throws Exception { String[] args = {}; App.main(args); } } ConsumerTest.java000066400000000000000000000020211264154357600352250ustar00rootroot00000000000000java-design-patterns-1.9.0/producer-consumer/src/test/java/com/iluwatar/producer/consumerpackage com.iluwatar.producer.consumer; import org.junit.Test; import org.mockito.InOrder; import static org.mockito.Mockito.inOrder; import static org.mockito.Mockito.reset; import static org.mockito.Mockito.spy; /** * Date: 12/27/15 - 11:01 PM * * @author Jeroen Meulemeester */ public class ConsumerTest extends StdOutTest { private static final int ITEM_COUNT = 5; @Test public void testConsume() throws Exception { final ItemQueue queue = spy(new ItemQueue()); for (int id = 0; id < ITEM_COUNT; id++) { queue.put(new Item("producer", id)); } reset(queue); // Don't count the preparation above as interactions with the queue final Consumer consumer = new Consumer("consumer", queue); final InOrder inOrder = inOrder(getStdOutMock()); for (int id = 0; id < ITEM_COUNT; id++) { consumer.consume(); inOrder.verify(getStdOutMock()) .println("Consumer [consumer] consume item [" + id + "] produced by [producer]"); } inOrder.verifyNoMoreInteractions(); } } ProducerTest.java000066400000000000000000000012021264154357600352150ustar00rootroot00000000000000java-design-patterns-1.9.0/producer-consumer/src/test/java/com/iluwatar/producer/consumerpackage com.iluwatar.producer.consumer; import org.junit.Test; import static org.mockito.Matchers.any; import static org.mockito.Mockito.mock; import static org.mockito.Mockito.verify; import static org.mockito.Mockito.verifyNoMoreInteractions; /** * Date: 12/28/15 - 12:12 AM * * @author Jeroen Meulemeester */ public class ProducerTest { @Test(timeout = 6000) public void testProduce() throws Exception { final ItemQueue queue = mock(ItemQueue.class); final Producer producer = new Producer("producer", queue); producer.produce(); verify(queue).put(any(Item.class)); verifyNoMoreInteractions(queue); } }StdOutTest.java000066400000000000000000000023211264154357600346570ustar00rootroot00000000000000java-design-patterns-1.9.0/producer-consumer/src/test/java/com/iluwatar/producer/consumerpackage com.iluwatar.producer.consumer; import org.junit.After; import org.junit.Before; import java.io.PrintStream; import static org.mockito.Mockito.mock; /** * Date: 12/10/15 - 8:37 PM * * @author Jeroen Meulemeester */ public abstract class StdOutTest { /** * The mocked standard out {@link PrintStream}, required since some actions don't have any * influence on accessible objects, except for writing to std-out using {@link System#out} */ private final PrintStream stdOutMock = mock(PrintStream.class); /** * Keep the original std-out so it can be restored after the test */ private final PrintStream stdOutOrig = System.out; /** * Inject the mocked std-out {@link PrintStream} into the {@link System} class before each test */ @Before public void setUp() { System.setOut(this.stdOutMock); 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W. kTԵKCJ^peG2ypR=y> yghCf6{%r!^ k^ucĉlw\^˝χOӝD"EJP歸.RQƗ38iVܔԩS{A&ZtL~Ν;1Fx()IrrvCmAۼڭ> H'&5r[5AÝIR_wȑ#͖$oB!s}g]B{k:y'U<7PޞOS=;0#Pg~ w9ʬf]}.!eݬl+H"xCx9 nTG#o+H"?|9V%ZŜMޛ:J^B ܜ+H"3cCUחsKR.>-U-'?Ii݆!|j_Na*sW-wD6C58p d3yZk*k֋W%ef=XQrZJΧjW긜^Ύ*řHG/+54ˍr q-_ky7<:rʆW꣑At%vHbKT*7$IV\?[>)iطKMCKLO| ^gTfT˗fI'}tVY)W(;2O"^ :nNL ٍMKC.{e 68,Pgv4KhmR,< ~yDzJ{E*!z}-SRr4Iy+)8 Vi&y|(X)I%x"#7'Fe4Ƈ䥡ڪ4V뜠44-@_qBQ(!dj RFD3H^J^vUЋ /[fkzGEoX{@c`zCL.|W^+/yQ'*WQ]O2(h2xAS򒬄{_wyҗ6cl`/I蘉%Oeu9cAf4>vEhhKcTSYM%4M$nG@y y勝cQ}II+IF_l2̂X)fl\BO9$ V8} zd0S"̿ -+nOH[)ufeC 8gt@_㇚ZO(s pE5村fwVXN)[H.T;aj$3<9Ry2Pna;/v5*Bɛ$b H^Ͳm6䅁8 y@@#$H^rD]KT< yi"` q ʎ >@P% c6]u~XRK^p%`DM-gBYb̀yH^G lyWn`x靗&Y6ۨJ,gBYώF(4Tf2[]A]5?cS OM/.2l_; +蛏SwV[nVYGp$>emN(IhѨ(ylDljtε.=!~2<~'nɛ obB2T"9NzJQD@A򔢃V6j| yi@\ v9 ɫmgd+廧I `ad:?A)4I}hPpTb$$%n~ŝo7ܒ쳅WV nSY'"NjI]"syYq;KrvW?< (y \]v~[nSIcղ!b{Q":FMb$/YӚWU]yɧ~H{ ,%(;6OKC*y}CjJEvw%?Dt^0uЍpc;zHKZguE^Eb8: yxH^5pELr)21NٱyH^*] } f|Wp"%b644 T"R5ڑܠnQ^Fj-t{ {l8hG&ɼ!R<>xQӟ*$ߘC!y}nIeyȉuFGVry|-ry1*$ߘMJ^LVc\b;9H0ɋaJ^buE_`Xb;= -pB2\E74&d<& yiW`1[ɋ9@0H^OpE3$/[uxKdu?d3n Tngcwʎ >@P% 7Wdyt`%.ky]-Q0v .ꊼ7x44D)'@|䥡J^cWd~s^fj+ywK]K@egWzM&tcQ>I]lܒ!y@@0PY:D=lcuK0CuṋO*$/ "'JsI4ﺼHݒ/y:g3dă b!y0S9&ۼBp:[rgqEn!;&=׻s'Y0Sz]ÀViS7ߛ“lA%VwE6mUɖ[GTIv{\ ^*<&$OJ^hiᇎS["*['#~n 6-ҡ!y$yQC~" P\I bߜ_3dd)E'0^J[q61А3zprm{rcɋ3 java-design-patterns-1.9.0/property/index.md000066400000000000000000000011111264154357600210730ustar00rootroot00000000000000--- layout: pattern title: Property folder: property permalink: /patterns/property/ categories: Creational tags: - Java - Difficulty-Beginner --- **Intent:** Create hierarchy of objects and new objects using already existing objects as parents. ![alt text](./etc/property.png "Property") **Applicability:** Use the Property pattern when * when you like to have objects with dynamic set of fields and prototype inheritance **Real world examples:** * [JavaScript](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Inheritance_and_the_prototype_chain) prototype inheritance java-design-patterns-1.9.0/property/pom.xml000066400000000000000000000011511264154357600207630ustar00rootroot00000000000000 4.0.0 com.iluwatar java-design-patterns 1.9.0 property junit junit test java-design-patterns-1.9.0/property/src/000077500000000000000000000000001264154357600202375ustar00rootroot00000000000000java-design-patterns-1.9.0/property/src/main/000077500000000000000000000000001264154357600211635ustar00rootroot00000000000000java-design-patterns-1.9.0/property/src/main/java/000077500000000000000000000000001264154357600221045ustar00rootroot00000000000000java-design-patterns-1.9.0/property/src/main/java/com/000077500000000000000000000000001264154357600226625ustar00rootroot00000000000000java-design-patterns-1.9.0/property/src/main/java/com/iluwatar/000077500000000000000000000000001264154357600245125ustar00rootroot00000000000000java-design-patterns-1.9.0/property/src/main/java/com/iluwatar/property/000077500000000000000000000000001264154357600263765ustar00rootroot00000000000000java-design-patterns-1.9.0/property/src/main/java/com/iluwatar/property/App.java000066400000000000000000000037161264154357600277700ustar00rootroot00000000000000package com.iluwatar.property; import com.iluwatar.property.Character.Type; /** * * The Property pattern is also known as Prototype inheritance. *

* In prototype inheritance instead of classes, as opposite to Java class inheritance, objects are * used to create another objects and object hierarchies. Hierarchies are created using prototype * chain through delegation: every object has link to parent object. Any base (parent) object can be * amended at runtime (by adding or removal of some property), and all child objects will be * affected as result. *

* In this example we demonstrate {@link Character} instantiation using the Property pattern. * */ public class App { /** * Program entry point * * @param args command line args */ public static void main(String[] args) { /* set up */ Prototype charProto = new Character(); charProto.set(Stats.STRENGTH, 10); charProto.set(Stats.AGILITY, 10); charProto.set(Stats.ARMOR, 10); charProto.set(Stats.ATTACK_POWER, 10); Character mageProto = new Character(Type.MAGE, charProto); mageProto.set(Stats.INTELLECT, 15); mageProto.set(Stats.SPIRIT, 10); Character warProto = new Character(Type.WARRIOR, charProto); warProto.set(Stats.RAGE, 15); warProto.set(Stats.ARMOR, 15); // boost default armor for warrior Character rogueProto = new Character(Type.ROGUE, charProto); rogueProto.set(Stats.ENERGY, 15); rogueProto.set(Stats.AGILITY, 15); // boost default agility for rogue /* usage */ Character mag = new Character("Player_1", mageProto); mag.set(Stats.ARMOR, 8); System.out.println(mag); Character warrior = new Character("Player_2", warProto); System.out.println(warrior); Character rogue = new Character("Player_3", rogueProto); System.out.println(rogue); Character rogueDouble = new Character("Player_4", rogue); rogueDouble.set(Stats.ATTACK_POWER, 12); System.out.println(rogueDouble); } } java-design-patterns-1.9.0/property/src/main/java/com/iluwatar/property/Character.java000066400000000000000000000044111264154357600311350ustar00rootroot00000000000000package com.iluwatar.property; import java.util.HashMap; import java.util.Map; /** * Represents Character in game and his abilities (base stats). */ public class Character implements Prototype { public enum Type { WARRIOR, MAGE, ROGUE } private final Prototype prototype; private final Map properties = new HashMap<>(); private String name; private Type type; /** * Constructor */ public Character() { this.prototype = new Prototype() { // Null-value object @Override public Integer get(Stats stat) { return null; } @Override public boolean has(Stats stat) { return false; } @Override public void set(Stats stat, Integer val) {} @Override public void remove(Stats stat) {} }; } public Character(Type type, Prototype prototype) { this.type = type; this.prototype = prototype; } /** * Constructor */ public Character(String name, Character prototype) { this.name = name; this.type = prototype.type; this.prototype = prototype; } public String name() { return name; } public Type type() { return type; } @Override public Integer get(Stats stat) { boolean containsValue = properties.containsKey(stat); if (containsValue) { return properties.get(stat); } else { return prototype.get(stat); } } @Override public boolean has(Stats stat) { return get(stat) != null; } @Override public void set(Stats stat, Integer val) { properties.put(stat, val); } @Override public void remove(Stats stat) { properties.put(stat, null); } @Override public String toString() { StringBuilder builder = new StringBuilder(); if (name != null) { builder.append("Player: ").append(name).append("\n"); } if (type != null) { builder.append("Character type: ").append(type.name()).append("\n"); } builder.append("Stats:\n"); for (Stats stat : Stats.values()) { Integer value = this.get(stat); if (value == null) { continue; } builder.append(" - ").append(stat.name()).append(":").append(value).append("\n"); } return builder.toString(); } } java-design-patterns-1.9.0/property/src/main/java/com/iluwatar/property/Prototype.java000066400000000000000000000003501264154357600312440ustar00rootroot00000000000000package com.iluwatar.property; /** * Interface for prototype inheritance */ public interface Prototype { Integer get(Stats stat); boolean has(Stats stat); void set(Stats stat, Integer val); void remove(Stats stat); } java-design-patterns-1.9.0/property/src/main/java/com/iluwatar/property/Stats.java000066400000000000000000000002741264154357600303420ustar00rootroot00000000000000package com.iluwatar.property; /** * All possible attributes that Character can have */ public enum Stats { AGILITY, STRENGTH, ATTACK_POWER, ARMOR, INTELLECT, SPIRIT, ENERGY, RAGE } java-design-patterns-1.9.0/property/src/test/000077500000000000000000000000001264154357600212165ustar00rootroot00000000000000java-design-patterns-1.9.0/property/src/test/java/000077500000000000000000000000001264154357600221375ustar00rootroot00000000000000java-design-patterns-1.9.0/property/src/test/java/com/000077500000000000000000000000001264154357600227155ustar00rootroot00000000000000java-design-patterns-1.9.0/property/src/test/java/com/iluwatar/000077500000000000000000000000001264154357600245455ustar00rootroot00000000000000java-design-patterns-1.9.0/property/src/test/java/com/iluwatar/property/000077500000000000000000000000001264154357600264315ustar00rootroot00000000000000java-design-patterns-1.9.0/property/src/test/java/com/iluwatar/property/AppTest.java000066400000000000000000000003041264154357600306510ustar00rootroot00000000000000package com.iluwatar.property; import org.junit.Test; /** * * Application test * */ public class AppTest { @Test public void test() { String[] args = {}; App.main(args); } } java-design-patterns-1.9.0/property/src/test/java/com/iluwatar/property/CharacterTest.java000066400000000000000000000057701264154357600320410ustar00rootroot00000000000000package com.iluwatar.property; import org.junit.Test; import static com.iluwatar.property.Character.Type; import static org.junit.Assert.assertEquals; import static org.junit.Assert.assertFalse; import static org.junit.Assert.assertNull; import static org.junit.Assert.assertTrue; /** * Date: 12/28/15 - 7:46 PM * * @author Jeroen Meulemeester */ public class CharacterTest { @Test public void testPrototypeStats() throws Exception { final Character prototype = new Character(); for (final Stats stat : Stats.values()) { assertFalse(prototype.has(stat)); assertNull(prototype.get(stat)); final Integer expectedValue = stat.ordinal(); prototype.set(stat, expectedValue); assertTrue(prototype.has(stat)); assertEquals(expectedValue, prototype.get(stat)); prototype.remove(stat); assertFalse(prototype.has(stat)); assertNull(prototype.get(stat)); } } @Test public void testCharacterStats() throws Exception { final Character prototype = new Character(); for (final Stats stat : Stats.values()) { prototype.set(stat, stat.ordinal()); } final Character mage = new Character(Type.MAGE, prototype); for (final Stats stat : Stats.values()) { final Integer expectedValue = stat.ordinal(); assertTrue(mage.has(stat)); assertEquals(expectedValue, mage.get(stat)); } } @Test public void testToString() throws Exception { final Character prototype = new Character(); prototype.set(Stats.ARMOR, 1); prototype.set(Stats.AGILITY, 2); prototype.set(Stats.INTELLECT, 3); assertEquals("Stats:\n - AGILITY:2\n - ARMOR:1\n - INTELLECT:3\n", prototype.toString()); final Character stupid = new Character(Type.ROGUE, prototype); stupid.remove(Stats.INTELLECT); assertEquals("Character type: ROGUE\nStats:\n - AGILITY:2\n - ARMOR:1\n", stupid.toString()); final Character weak = new Character("weak", prototype); weak.remove(Stats.ARMOR); assertEquals("Player: weak\nStats:\n - AGILITY:2\n - INTELLECT:3\n", weak.toString()); } @Test public void testName() throws Exception { final Character prototype = new Character(); prototype.set(Stats.ARMOR, 1); prototype.set(Stats.INTELLECT, 2); assertNull(prototype.name()); final Character stupid = new Character(Type.ROGUE, prototype); stupid.remove(Stats.INTELLECT); assertNull(stupid.name()); final Character weak = new Character("weak", prototype); weak.remove(Stats.ARMOR); assertEquals("weak", weak.name()); } @Test public void testType() throws Exception { final Character prototype = new Character(); prototype.set(Stats.ARMOR, 1); prototype.set(Stats.INTELLECT, 2); assertNull(prototype.type()); final Character stupid = new Character(Type.ROGUE, prototype); stupid.remove(Stats.INTELLECT); assertEquals(Type.ROGUE, stupid.type()); final Character weak = new Character("weak", prototype); weak.remove(Stats.ARMOR); assertNull(weak.type()); } }java-design-patterns-1.9.0/prototype/000077500000000000000000000000001264154357600176315ustar00rootroot00000000000000java-design-patterns-1.9.0/prototype/etc/000077500000000000000000000000001264154357600204045ustar00rootroot00000000000000java-design-patterns-1.9.0/prototype/etc/prototype.png000066400000000000000000001115671264154357600231720ustar00rootroot00000000000000PNG  IHDR2>IDATx,W}d^0 l )x=avG/mp5smLƄk0&.ƌ-s y\g#Ziew6&D&HN9TuuuթSUߏ~TWW>:[@N@r175t#dD(:%*G ͺ,E@HA`d H \T,3(!&Yeg% 1pPBRM  K@b:!ޒQ[Nj*iYeRd H \QxY2\y'NW DSǖ K@b:BR3cO9Zւ?:KBDK{0l,V K@b:CR3̪*~>2,BXDcVX$q!N.ҝv-l,VM$H!4}؋@3m3kvLjgP`}N& g6UEc/Au@ CҰ'c;QV7L`Cz3V'=I/(lgb/@T YYEZ"Gv7|=x ]b'auV7!wYEL}ݣ! 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It may be more convenient to install a corresponding number of prototypes and clone them rather than instantiating the class manually, each time with the appropriate state **Real world examples:** * [java.lang.Object#clone()](http://docs.oracle.com/javase/8/docs/api/java/lang/Object.html#clone%28%29) **Credits** * [Design Patterns: Elements of Reusable Object-Oriented Software](http://www.amazon.com/Design-Patterns-Elements-Reusable-Object-Oriented/dp/0201633612) java-design-patterns-1.9.0/prototype/pom.xml000066400000000000000000000013701264154357600211470ustar00rootroot00000000000000 4.0.0 com.iluwatar java-design-patterns 1.9.0 prototype junit junit test org.mockito mockito-core test java-design-patterns-1.9.0/prototype/src/000077500000000000000000000000001264154357600204205ustar00rootroot00000000000000java-design-patterns-1.9.0/prototype/src/main/000077500000000000000000000000001264154357600213445ustar00rootroot00000000000000java-design-patterns-1.9.0/prototype/src/main/java/000077500000000000000000000000001264154357600222655ustar00rootroot00000000000000java-design-patterns-1.9.0/prototype/src/main/java/com/000077500000000000000000000000001264154357600230435ustar00rootroot00000000000000java-design-patterns-1.9.0/prototype/src/main/java/com/iluwatar/000077500000000000000000000000001264154357600246735ustar00rootroot00000000000000java-design-patterns-1.9.0/prototype/src/main/java/com/iluwatar/prototype/000077500000000000000000000000001264154357600267405ustar00rootroot00000000000000java-design-patterns-1.9.0/prototype/src/main/java/com/iluwatar/prototype/App.java000066400000000000000000000027321264154357600303270ustar00rootroot00000000000000package com.iluwatar.prototype; /** * * The Prototype pattern is a creational design pattern in software development. It is used when the * type of objects to create is determined by a prototypical instance, which is cloned to produce * new objects. This pattern is used to: - avoid subclasses of an object creator in the client * application, like the abstract factory pattern does. - avoid the inherent cost of creating a new * object in the standard way (e.g., using the 'new' keyword) *

* In this example we have a factory class ({@link HeroFactoryImpl}) producing objects by cloning * the existing ones. The factory's prototype objects are given as constructor parameters. * */ public class App { /** * Program entry point * * @param args command line args */ public static void main(String[] args) { HeroFactory factory; Mage mage; Warlord warlord; Beast beast; factory = new HeroFactoryImpl(new ElfMage(), new ElfWarlord(), new ElfBeast()); mage = factory.createMage(); warlord = factory.createWarlord(); beast = factory.createBeast(); System.out.println(mage); System.out.println(warlord); System.out.println(beast); factory = new HeroFactoryImpl(new OrcMage(), new OrcWarlord(), new OrcBeast()); mage = factory.createMage(); warlord = factory.createWarlord(); beast = factory.createBeast(); System.out.println(mage); System.out.println(warlord); System.out.println(beast); } } java-design-patterns-1.9.0/prototype/src/main/java/com/iluwatar/prototype/Beast.java000066400000000000000000000002741264154357600306440ustar00rootroot00000000000000package com.iluwatar.prototype; /** * * Beast * */ public abstract class Beast extends Prototype { @Override public abstract Beast clone() throws CloneNotSupportedException; } java-design-patterns-1.9.0/prototype/src/main/java/com/iluwatar/prototype/ElfBeast.java000066400000000000000000000004541264154357600312730ustar00rootroot00000000000000package com.iluwatar.prototype; /** * * ElfBeast * */ public class ElfBeast extends Beast { public ElfBeast() {} @Override public Beast clone() throws CloneNotSupportedException { return new ElfBeast(); } @Override public String toString() { return "Elven eagle"; } } java-design-patterns-1.9.0/prototype/src/main/java/com/iluwatar/prototype/ElfMage.java000066400000000000000000000004451264154357600311060ustar00rootroot00000000000000package com.iluwatar.prototype; /** * * ElfMage * */ public class ElfMage extends Mage { public ElfMage() {} @Override public Mage clone() throws CloneNotSupportedException { return new ElfMage(); } @Override public String toString() { return "Elven mage"; } } java-design-patterns-1.9.0/prototype/src/main/java/com/iluwatar/prototype/ElfWarlord.java000066400000000000000000000004721264154357600316470ustar00rootroot00000000000000package com.iluwatar.prototype; /** * * ElfWarlord * */ public class ElfWarlord extends Warlord { public ElfWarlord() {} @Override public Warlord clone() throws CloneNotSupportedException { return new ElfWarlord(); } @Override public String toString() { return "Elven warlord"; } } java-design-patterns-1.9.0/prototype/src/main/java/com/iluwatar/prototype/HeroFactory.java000066400000000000000000000003211264154357600320240ustar00rootroot00000000000000package com.iluwatar.prototype; /** * * Interface for the factory class. * */ public interface HeroFactory { Mage createMage(); Warlord createWarlord(); Beast createBeast(); } java-design-patterns-1.9.0/prototype/src/main/java/com/iluwatar/prototype/HeroFactoryImpl.java000066400000000000000000000017031264154357600326530ustar00rootroot00000000000000package com.iluwatar.prototype; /** * * Concrete factory class. * */ public class HeroFactoryImpl implements HeroFactory { private Mage mage; private Warlord warlord; private Beast beast; /** * Constructor */ public HeroFactoryImpl(Mage mage, Warlord warlord, Beast beast) { this.mage = mage; this.warlord = warlord; this.beast = beast; } /** * Create mage */ public Mage createMage() { try { return mage.clone(); } catch (CloneNotSupportedException e) { return null; } } /** * Create warlord */ public Warlord createWarlord() { try { return warlord.clone(); } catch (CloneNotSupportedException e) { return null; } } /** * Create beast */ public Beast createBeast() { try { return beast.clone(); } catch (CloneNotSupportedException e) { return null; } } } java-design-patterns-1.9.0/prototype/src/main/java/com/iluwatar/prototype/Mage.java000066400000000000000000000002711264154357600304540ustar00rootroot00000000000000package com.iluwatar.prototype; /** * * Mage * */ public abstract class Mage extends Prototype { @Override public abstract Mage clone() throws CloneNotSupportedException; } java-design-patterns-1.9.0/prototype/src/main/java/com/iluwatar/prototype/OrcBeast.java000066400000000000000000000004541264154357600313100ustar00rootroot00000000000000package com.iluwatar.prototype; /** * * OrcBeast * */ public class OrcBeast extends Beast { public OrcBeast() {} @Override public Beast clone() throws CloneNotSupportedException { return new OrcBeast(); } @Override public String toString() { return "Orcish wolf"; } } java-design-patterns-1.9.0/prototype/src/main/java/com/iluwatar/prototype/OrcMage.java000066400000000000000000000004461264154357600311240ustar00rootroot00000000000000package com.iluwatar.prototype; /** * * OrcMage * */ public class OrcMage extends Mage { public OrcMage() {} @Override public Mage clone() throws CloneNotSupportedException { return new OrcMage(); } @Override public String toString() { return "Orcish mage"; } } java-design-patterns-1.9.0/prototype/src/main/java/com/iluwatar/prototype/OrcWarlord.java000066400000000000000000000004731264154357600316650ustar00rootroot00000000000000package com.iluwatar.prototype; /** * * OrcWarlord * */ public class OrcWarlord extends Warlord { public OrcWarlord() {} @Override public Warlord clone() throws CloneNotSupportedException { return new OrcWarlord(); } @Override public String toString() { return "Orcish warlord"; } } java-design-patterns-1.9.0/prototype/src/main/java/com/iluwatar/prototype/Prototype.java000066400000000000000000000003101264154357600316020ustar00rootroot00000000000000package com.iluwatar.prototype; /** * * Prototype * */ public abstract class Prototype implements Cloneable { @Override public abstract Object clone() throws CloneNotSupportedException; } java-design-patterns-1.9.0/prototype/src/main/java/com/iluwatar/prototype/Warlord.java000066400000000000000000000003021264154357600312100ustar00rootroot00000000000000package com.iluwatar.prototype; /** * * Warlord * */ public abstract class Warlord extends Prototype { @Override public abstract Warlord clone() throws CloneNotSupportedException; } java-design-patterns-1.9.0/prototype/src/test/000077500000000000000000000000001264154357600213775ustar00rootroot00000000000000java-design-patterns-1.9.0/prototype/src/test/java/000077500000000000000000000000001264154357600223205ustar00rootroot00000000000000java-design-patterns-1.9.0/prototype/src/test/java/com/000077500000000000000000000000001264154357600230765ustar00rootroot00000000000000java-design-patterns-1.9.0/prototype/src/test/java/com/iluwatar/000077500000000000000000000000001264154357600247265ustar00rootroot00000000000000java-design-patterns-1.9.0/prototype/src/test/java/com/iluwatar/prototype/000077500000000000000000000000001264154357600267735ustar00rootroot00000000000000java-design-patterns-1.9.0/prototype/src/test/java/com/iluwatar/prototype/AppTest.java000066400000000000000000000003051264154357600312140ustar00rootroot00000000000000package com.iluwatar.prototype; import org.junit.Test; /** * * Application test * */ public class AppTest { @Test public void test() { String[] args = {}; App.main(args); } } java-design-patterns-1.9.0/prototype/src/test/java/com/iluwatar/prototype/HeroFactoryImplTest.java000066400000000000000000000021441264154357600335460ustar00rootroot00000000000000package com.iluwatar.prototype; import org.junit.Test; import static org.junit.Assert.assertNull; import static org.mockito.Mockito.mock; import static org.mockito.Mockito.verify; import static org.mockito.Mockito.verifyNoMoreInteractions; import static org.mockito.Mockito.when; /** * Date: 12/28/15 - 8:34 PM * * @author Jeroen Meulemeester */ public class HeroFactoryImplTest { @Test public void testFactory() throws Exception { final Mage mage = mock(Mage.class); final Warlord warlord = mock(Warlord.class); final Beast beast = mock(Beast.class); when(mage.clone()).thenThrow(CloneNotSupportedException.class); when(warlord.clone()).thenThrow(CloneNotSupportedException.class); when(beast.clone()).thenThrow(CloneNotSupportedException.class); final HeroFactoryImpl factory = new HeroFactoryImpl(mage, warlord, beast); assertNull(factory.createMage()); assertNull(factory.createWarlord()); assertNull(factory.createBeast()); verify(mage).clone(); verify(warlord).clone(); verify(beast).clone(); verifyNoMoreInteractions(mage, warlord, beast); } }java-design-patterns-1.9.0/prototype/src/test/java/com/iluwatar/prototype/PrototypeTest.java000066400000000000000000000036061264154357600325100ustar00rootroot00000000000000package com.iluwatar.prototype; import org.junit.Test; import org.junit.runner.RunWith; import org.junit.runners.Parameterized; import java.util.Arrays; import java.util.Collection; import static org.junit.Assert.assertEquals; import static org.junit.Assert.assertNotNull; import static org.junit.Assert.assertNotSame; import static org.junit.Assert.assertSame; /** * Date: 12/28/15 - 8:45 PM * * @author Jeroen Meulemeester */ @RunWith(Parameterized.class) public class PrototypeTest

{ @Parameterized.Parameters public static Collection data() { return Arrays.asList( new Object[]{new OrcBeast(), "Orcish wolf"}, new Object[]{new OrcMage(), "Orcish mage"}, new Object[]{new OrcWarlord(), "Orcish warlord"}, new Object[]{new ElfBeast(), "Elven eagle"}, new Object[]{new ElfMage(), "Elven mage"}, new Object[]{new ElfWarlord(), "Elven warlord"} ); } /** * The tested prototype instance */ private final Prototype testedPrototype; /** * The expected {@link Prototype#toString()} value */ private final String expectedToString; /** * Create a new test instance, using the given test object and expected value * * @param testedPrototype The tested prototype instance * @param expectedToString The expected {@link Prototype#toString()} value */ public PrototypeTest(final Prototype testedPrototype, final String expectedToString) { this.expectedToString = expectedToString; this.testedPrototype = testedPrototype; } @Test public void testPrototype() throws Exception { assertEquals(this.expectedToString, this.testedPrototype.toString()); final Object clone = this.testedPrototype.clone(); assertNotNull(clone); assertNotSame(clone, this.testedPrototype); assertSame(this.testedPrototype.getClass(), clone.getClass()); } } java-design-patterns-1.9.0/proxy/000077500000000000000000000000001264154357600167455ustar00rootroot00000000000000java-design-patterns-1.9.0/proxy/etc/000077500000000000000000000000001264154357600175205ustar00rootroot00000000000000java-design-patterns-1.9.0/proxy/etc/proxy.png000066400000000000000000000224021264154357600214070ustar00rootroot00000000000000PNG  IHDR%8Mre$IDATx]oE>_LҘ7\IiPˡ) V \ ܊#h(JOO%| ESx~svvw;{9g7ON;yit!/iNR# "61qiR `5P @6@Aq2= [,Pkpo!sܳ@oKT{&ZAg7:O#ȷTCpL0:lͷ˷:%gBTރKsܳ7z ȷ^.4kӬUWo Z<%xHi 0ڃlErܳ 7V˷8\6jE$N1 Y^t`x71[rܳ7_]gkߙogU6Fouiz.9YBgZ| j -d{589YBgZ| j |;[ǧklf,$x.qRHTگoO<Δwv|;;b,D_-W_&DSqPETujJ|wmW7/fCϽku'wu"*y_[^G+o;+J!8ח,;JR.YY՚jЅy QS*%y گo<9s;}wNo?ǎ?#wbb8p͑:dd|hLZ$\Ԏ|m 6F2*KR[:"C=jv=JBm z}S3w>÷8;D$ˋ? ͝L-ki+R;TuZEk#4%~I7 xx^.{_-vpܵWYjߺ+K⧪f *^Cu)@6hoGm4%?T*wbAYb C0dJ0ՈػnϫݰjzM{Djة2Mv`LZGJsZ 4'HSrzU(QؑEH-t$ozO>j'nXs [hU 6 sz)kʝo bSn5K\\FCƷsoU7s~~}vVʛ6nnh!x>fբHǵiʥ?)y$]fkJA,a(0vYMG=~M\u?Ns:JN_Ѝ:1Ӕ|I̠>S7ZaᎍOlxx e,DS!yC`H[|yf՝d&ʘM0Nr P2!-(Ν %ߺQwC[W?~Ӯݪ4Aj -d{589YBgZ| j -d{589YBgZ#(ߤ[1הouõouAMVK]gk߅otZie{JRccf+XYvqDYTِWN%j45{KSs+oH㞥 ߠAu= Hv$Y&lKG ^9@lLޓ@ozz]"Z`)Lɟ<3F6A%z0ne^dSfXMi-ہUo 㖳Lgofwrg)552i"=x||SZO)iZāR.C C.g)H0ǚAz`xgim|oJՕ&g:(PRJSҫ X׃MeOޜN{>+xPvaO q `GouoIr]2tYեlK.YU4L'DXbD]6*{ArܳLu}$ngZ:[Wou2= [,Pkpo!sܳ@aۊ5 \ZBѾ<  'gZ| j -d{589Y0_\0_R#AMމ/wE^k{U`3S\kK{U8ab#·k0+sL÷w^GF w[&6t#ٸ,ډ3D6Wi$dB,3+qη/̙6Qv ?bدo"]3S¾]DH5ݳ)Tc{ cUj%g)7ri:oiL l uN\܍7cxMُZi9Y<6pG)Dʰ;v o;`OvJ~m\6=uIӇL5lpKxP.U:ʱϨ-o}V>=wef]}4:FD7 :Yul7hۺ>}/b㱙gNpezަn!Odg6P8\3l*)4MgHKYUxCȷOj~u3{bt,PىlbxCuCzd3ͨJV'n;fěe7N/KL}Ŧx33=@/ +ʰM|3|ѧ.|hE<>*'8fa[懐o[?rա<ܣUY3tVZRJ8mf-۷tuzV8`kWNvJasDu iDfY?Fn",a6.N1v`(NE3.X\EJ7( k>Lg)ɾ;}cym4dT|S䣏>`4VS}jЮ߼X^;߼ـolڴرcJg?Yc,ew潆ɸRuGfbIll䦇Dc=ײ'][J7*lflnj޸bygGfoB.w۷ݻszBhyW#cJ7.::mPs14^pA?~z "V|Ga+VLLLLOOϳ)U.bF|3YcId< .O" j[sY^^fZ$mʕuA`R UvF:|xָ&.t* '-tB ' ğj)Q7?Y~bT O͸>Au&Y2t* \0xK|T.A* R Cb(|T+.\;\ Jܹ VfffCbX|T+Q  oo 7E7HR\|T(5 JU R|ko[s|T%A* ތA*la RQ7H%F |/ؚ&|&|&ĥ $Zs&AT||7m|4lLuʿg" 4Ӡ37\l7ʁoF8LVCd{1>7gGWS&U<]jܜD [|ĥ(#ӳ2B&qzƐEznLփ&k6r{qqA_jO4ۋ8Rߌ7:][#m0h&+XC\ǡwsOoۥI/4ShF_FoP-q:G;vGyL$$AF@LFo#)Нal4cw&mqz7ZM( @O> oe4 ql77~}~r?o?oV-νu֧t1 u  fwmǷs+v_I4X|ebE_5U\|۷iR2ߪ#՗w]3wz:ou{쓻NUr`d͇:/-=Fr[%`Fֲ=x|ۙw_Qp/Yʥh]b1bW5ՠ ӳoYMu$/lcV nyrw9+'~xaiG>M*I|9"7B8HGdXYLZ$\c|#x7qEoGIDlshƩ%Y1aI Ho"u uvm@÷57,l~߲'O}?VH-*Y!Kr7T_z- 4vyjJ!iJjZR27=5aRŹG@) /|cʼn̟ob`W]{垵b$~J*a+"ASBnѨ"PQ+ݳUrUB ? jV6(Ȇy SroyC&jiiz"B3o]ػnϫݰjzM{DڷԴW,H;ա]M$\(4sуrOW Ō.qq(Kݼ6uhV*-Vڷ~s{'c=k?<6ث˟޺aa?ΉKjG%@h':% S)9JP+喯MoxL㛭)7$q m*ù^w?~?}>ӿtx ;+}東6BTor,OJ>zsI'ٚRj [~zyv.d |s/lǚ54};^ȩtx˕?Y ѫI32g-Ka+yKSE&$ H02U9g2Vxٰp'lv1޾6gַ&>Q4yz*[yF`j45{Y`_|<\ -R t{Dꐃ:z77u1-Kŵ&rK X_Lɟ<3F:dpo C?nntmƷ6̚؇q{aoHYf|MQȑr +T(S7ڒāAQg=CsJ761+۰"T9Оm-[ʽ)5Mdo%ء}륪5ELv!2u|3[ũ}V q+UaFR}͸5w#mTV<šT5@yepw#o (Ce?_Ivs:nԟ.RX::##Alj(hcY>n($ }Ȣ ((&'/q0uZe*:woI`4Ƕ],(gΔv.ʅ,N;')bmO|I-̂ D<XU7u(M7tH/CI.ҘY|84i!082"apoJQ|=I*.},/!^6PȨ&cѾ|K-dfGDžL&R'Wfʔ'n uNg.Q3B7|%oي<4 FQN2˟iZi!RkaC9E3Ƅ̦=YȜ/)Q̝/%o90̰5{~rw4M".C2o<'E3ʁofnm [C͈iͦgM;E6w̟f٬2m141^~F$H[e~R[O> | s?gԜ+[T |7 | %iLUr-i5 @J*̇oIpyY+" ,J4=k^"(sm(*r #7oyݙƼʊո-Q oR v.-6?&{Z א0|`ߝi̫o~/dꇂ:1)s~ #7 [qdpQm!^݃Unt,57 #"0SK#UnOٕـ~ L79(`P[Ƌ2mdf=wef]}$;|ޛ_nzuX4^ݏn{ۿ9vxNV[Rj~J nb9>7oJR_“NT# q-}/b㱙gNpeJpNt'nD:S$cLkO S:$ 9)uT҄-=gaY3;*ĉfYD/f̗ɋԢW۴V3A|xfp?eY3 [i4IIT:i΅2MNɾLVٴ6bۖ\u}/;59vpi .}lr^n?|o zv2f35J|7w}{_ݷO;kƉQM$Իoo!&mKe$v`ʉ^Xy4A fEfx<@LL`kP>4[\o!>Q`}ITow; }T~N[|7 |߆|. 9_ҷ9=CI* y_7پ{-7" yɫ=7ɾX4T[l)H-_z&aMȥ.yͨ}8Rw[MqauPr}lUi"=v|Kdd"mb1 jB[6IMpv7V3RFMAM ֟Jhߝ<8R8wHڕeEiBn(CGѾe|pv6J|ap&kk3 o|`h"qkF7Z)fBOδ+7Ut|H&Q3kk߆rumXoP;XqQ $E|@D7ğo?n#0IENDB`java-design-patterns-1.9.0/proxy/etc/proxy.ucls000066400000000000000000000054221264154357600215740ustar00rootroot00000000000000 java-design-patterns-1.9.0/proxy/etc/proxy_1.png000066400000000000000000000560431264154357600216370ustar00rootroot00000000000000PNG  IHDR6[IDATx | WC(. 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Here are several common situations in which the Proxy pattern is applicable * a remote proxy provides a local representative for an object in a different address space. * a virtual proxy creates expensive objects on demand. * a protection proxy controls access to the original object. Protection proxies are useful when objects should have different access rights. **Typical Use Case:** * control access to another object * lazy initialization * implement logging * facilitate network connection * to count references to an object **Real world examples:** * [java.lang.reflect.Proxy](http://docs.oracle.com/javase/8/docs/api/java/lang/reflect/Proxy.html) * [Apache Commons Proxy](https://commons.apache.org/proper/commons-proxy/) **Credits** * [Design Patterns: Elements of Reusable Object-Oriented Software](http://www.amazon.com/Design-Patterns-Elements-Reusable-Object-Oriented/dp/0201633612) java-design-patterns-1.9.0/proxy/pom.xml000066400000000000000000000013641264154357600202660ustar00rootroot00000000000000 4.0.0 com.iluwatar java-design-patterns 1.9.0 proxy junit junit test org.mockito mockito-core test java-design-patterns-1.9.0/proxy/src/000077500000000000000000000000001264154357600175345ustar00rootroot00000000000000java-design-patterns-1.9.0/proxy/src/main/000077500000000000000000000000001264154357600204605ustar00rootroot00000000000000java-design-patterns-1.9.0/proxy/src/main/java/000077500000000000000000000000001264154357600214015ustar00rootroot00000000000000java-design-patterns-1.9.0/proxy/src/main/java/com/000077500000000000000000000000001264154357600221575ustar00rootroot00000000000000java-design-patterns-1.9.0/proxy/src/main/java/com/iluwatar/000077500000000000000000000000001264154357600240075ustar00rootroot00000000000000java-design-patterns-1.9.0/proxy/src/main/java/com/iluwatar/proxy/000077500000000000000000000000001264154357600251705ustar00rootroot00000000000000java-design-patterns-1.9.0/proxy/src/main/java/com/iluwatar/proxy/App.java000066400000000000000000000023201264154357600265500ustar00rootroot00000000000000package com.iluwatar.proxy; /** * * A proxy, in its most general form, is a class functioning as an interface to something else. The * proxy could interface to anything: a network connection, a large object in memory, a file, or * some other resource that is expensive or impossible to duplicate. In short, a proxy is a wrapper * or agent object that is being called by the client to access the real serving object behind the * scenes. *

* The Proxy design pattern allows you to provide an interface to other objects by creating a * wrapper class as the proxy. The wrapper class, which is the proxy, can add additional * functionality to the object of interest without changing the object's code. *

* In this example the proxy ({@link WizardTowerProxy}) controls access to the actual object ( * {@link WizardTower}). * */ public class App { /** * Program entry point */ public static void main(String[] args) { WizardTowerProxy tower = new WizardTowerProxy(); tower.enter(new Wizard("Red wizard")); tower.enter(new Wizard("White wizard")); tower.enter(new Wizard("Black wizard")); tower.enter(new Wizard("Green wizard")); tower.enter(new Wizard("Brown wizard")); } } java-design-patterns-1.9.0/proxy/src/main/java/com/iluwatar/proxy/Wizard.java000066400000000000000000000003401264154357600272700ustar00rootroot00000000000000package com.iluwatar.proxy; /** * * Wizard * */ public class Wizard { private String name; public Wizard(String name) { this.name = name; } @Override public String toString() { return name; } } java-design-patterns-1.9.0/proxy/src/main/java/com/iluwatar/proxy/WizardTower.java000066400000000000000000000003271264154357600303160ustar00rootroot00000000000000package com.iluwatar.proxy; /** * * The object to be proxyed. * */ public class WizardTower { public void enter(Wizard wizard) { System.out.println(wizard + " enters the tower."); } } java-design-patterns-1.9.0/proxy/src/main/java/com/iluwatar/proxy/WizardTowerProxy.java000066400000000000000000000007231264154357600313600ustar00rootroot00000000000000package com.iluwatar.proxy; /** * * The proxy controlling access to the {@link WizardTower}. * */ public class WizardTowerProxy extends WizardTower { private static final int NUM_WIZARDS_ALLOWED = 3; private int numWizards; @Override public void enter(Wizard wizard) { if (numWizards < NUM_WIZARDS_ALLOWED) { super.enter(wizard); numWizards++; } else { System.out.println(wizard + " is not allowed to enter!"); } } } java-design-patterns-1.9.0/proxy/src/test/000077500000000000000000000000001264154357600205135ustar00rootroot00000000000000java-design-patterns-1.9.0/proxy/src/test/java/000077500000000000000000000000001264154357600214345ustar00rootroot00000000000000java-design-patterns-1.9.0/proxy/src/test/java/com/000077500000000000000000000000001264154357600222125ustar00rootroot00000000000000java-design-patterns-1.9.0/proxy/src/test/java/com/iluwatar/000077500000000000000000000000001264154357600240425ustar00rootroot00000000000000java-design-patterns-1.9.0/proxy/src/test/java/com/iluwatar/proxy/000077500000000000000000000000001264154357600252235ustar00rootroot00000000000000java-design-patterns-1.9.0/proxy/src/test/java/com/iluwatar/proxy/AppTest.java000066400000000000000000000003011264154357600274400ustar00rootroot00000000000000package com.iluwatar.proxy; import org.junit.Test; /** * * Application test * */ public class AppTest { @Test public void test() { String[] args = {}; App.main(args); } } java-design-patterns-1.9.0/proxy/src/test/java/com/iluwatar/proxy/StdOutTest.java000066400000000000000000000023051264154357600301500ustar00rootroot00000000000000package com.iluwatar.proxy; import org.junit.After; import org.junit.Before; import java.io.PrintStream; import static org.mockito.Mockito.mock; /** * Date: 12/10/15 - 8:37 PM * * @author Jeroen Meulemeester */ public abstract class StdOutTest { /** * The mocked standard out {@link PrintStream}, required since some actions don't have any * influence on accessible objects, except for writing to std-out using {@link System#out} */ private final PrintStream stdOutMock = mock(PrintStream.class); /** * Keep the original std-out so it can be restored after the test */ private final PrintStream stdOutOrig = System.out; /** * Inject the mocked std-out {@link PrintStream} into the {@link System} class before each test */ @Before public void setUp() { System.setOut(this.stdOutMock); } /** * Removed the mocked std-out {@link PrintStream} again from the {@link System} class */ @After public void tearDown() { System.setOut(this.stdOutOrig); } /** * Get the mocked stdOut {@link PrintStream} * * @return The stdOut print stream mock, renewed before each test */ final PrintStream getStdOutMock() { return this.stdOutMock; } } java-design-patterns-1.9.0/proxy/src/test/java/com/iluwatar/proxy/WizardTest.java000066400000000000000000000006671264154357600301770ustar00rootroot00000000000000package com.iluwatar.proxy; import org.junit.Test; import static org.junit.Assert.assertEquals; /** * Date: 12/28/15 - 9:02 PM * * @author Jeroen Meulemeester */ public class WizardTest { @Test public void testToString() throws Exception { final String[] wizardNames = {"Gandalf", "Dumbledore", "Oz", "Merlin"}; for (final String name : wizardNames) { assertEquals(name, new Wizard(name).toString()); } } }java-design-patterns-1.9.0/proxy/src/test/java/com/iluwatar/proxy/WizardTowerProxyTest.java000066400000000000000000000017631264154357600322600ustar00rootroot00000000000000package com.iluwatar.proxy; import org.junit.Test; import org.mockito.InOrder; import static org.mockito.Mockito.inOrder; /** * Date: 12/28/15 - 9:18 PM * * @author Jeroen Meulemeester */ public class WizardTowerProxyTest extends StdOutTest { @Test public void testEnter() throws Exception { final Wizard[] wizards = new Wizard[]{ new Wizard("Gandalf"), new Wizard("Dumbledore"), new Wizard("Oz"), new Wizard("Merlin") }; final WizardTowerProxy tower = new WizardTowerProxy(); for (final Wizard wizard : wizards) { tower.enter(wizard); } final InOrder inOrder = inOrder(getStdOutMock()); inOrder.verify(getStdOutMock()).println("Gandalf enters the tower."); inOrder.verify(getStdOutMock()).println("Dumbledore enters the tower."); inOrder.verify(getStdOutMock()).println("Oz enters the tower."); inOrder.verify(getStdOutMock()).println("Merlin is not allowed to enter!"); inOrder.verifyNoMoreInteractions(); } }java-design-patterns-1.9.0/proxy/src/test/java/com/iluwatar/proxy/WizardTowerTest.java000066400000000000000000000017351264154357600312150ustar00rootroot00000000000000package com.iluwatar.proxy; import org.junit.Test; import org.mockito.InOrder; import static org.mockito.Mockito.inOrder; /** * Date: 12/28/15 - 9:18 PM * * @author Jeroen Meulemeester */ public class WizardTowerTest extends StdOutTest { @Test public void testEnter() throws Exception { final Wizard[] wizards = new Wizard[]{ new Wizard("Gandalf"), new Wizard("Dumbledore"), new Wizard("Oz"), new Wizard("Merlin") }; final WizardTower tower = new WizardTower(); for (final Wizard wizard : wizards) { tower.enter(wizard); } final InOrder inOrder = inOrder(getStdOutMock()); inOrder.verify(getStdOutMock()).println("Gandalf enters the tower."); inOrder.verify(getStdOutMock()).println("Dumbledore enters the tower."); inOrder.verify(getStdOutMock()).println("Oz enters the tower."); inOrder.verify(getStdOutMock()).println("Merlin enters the tower."); inOrder.verifyNoMoreInteractions(); } }java-design-patterns-1.9.0/publish-subscribe/000077500000000000000000000000001264154357600212115ustar00rootroot00000000000000java-design-patterns-1.9.0/publish-subscribe/.gitignore000066400000000000000000000000111264154357600231710ustar00rootroot00000000000000/target/ java-design-patterns-1.9.0/publish-subscribe/etc/000077500000000000000000000000001264154357600217645ustar00rootroot00000000000000java-design-patterns-1.9.0/publish-subscribe/etc/publish-subscribe.png000066400000000000000000000661351264154357600261320ustar00rootroot00000000000000PNG  IHDR Yl$IDATxo$G}=ʋ(yt/~z{9,tB''+΃F,ƈ5p>^/8#}Nwkb' #nPMPy/U{QwjF(8XAԻP-Ŀiѷ \c3IUJ)@@PpP.P%|00 z  ^B@(o/t.x$|00Z(xk9@=``(cTv glFCN$|  b, >eIf<`KHivݗ'aq"NڝD0FE n VR3cNm)d. b< EG(.D3CE~@QæyNgwwȊRVoMgxb +!~\; 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3l.[湾xUQ;C!ɚj;;*"a1B_B. ~O=镍Zo_^hji2r!JZs ]m%"sA4@Oïgݫ"=Zy~ru#҃_ao1z^hvނOC:4; ~ҥ۠I{VOgtM҇ut[_]:y|=%zowğSh~)w[72dF_}gC{ BD"N uV_t: J쩃wEX[ܳtHg>ϟl%+?I fo;^;#tU-O:PN5:҇oexM}+܏߾v}&8x7}#;xV?zՔo4rZ:* 3GaY{G @1>=d -,BŐh%w2 OOCէ1 AQ'5*1Huz9dyMQ"'+:ۇVKP'6!xPaN!8_>\3?>є!iCmWnq@^I/}O<Ć3jYi 1ndo-1wܩ<ŨY /gfa^OIݻ_8 PZ6CK %Um_:2S*3h>Jie.?} 8Bp WQ<'c/ sa&#BI%$8,P1!intj3N2IX/?]\zhмb/ 3Gark|%'Ő_*f Ȭ!8?}=1 G{ߠ C~`9 { @1 G{ߠ C~`9 { J?~li7::p`UV`U~NIENDB`java-design-patterns-1.9.0/publish-subscribe/etc/publish-subscribe.ucls000066400000000000000000000300501264154357600262770ustar00rootroot00000000000000 java-design-patterns-1.9.0/publish-subscribe/index.md000066400000000000000000000007311264154357600226430ustar00rootroot00000000000000--- layout: pattern title: Publish Subscribe folder: publish-subscribe permalink: /patterns/publish-subscribe/ categories: Integration tags: - Java - EIP - Camel --- **Intent:** Broadcast messages from sender to all the interested receivers. ![alt text](./etc/publish-subscribe.png "Publish Subscribe Channel") **Applicability:** Use the Publish Subscribe Channel pattern when * two or more applications need to communicate using a messaging system for broadcasts. java-design-patterns-1.9.0/publish-subscribe/pom.xml000066400000000000000000000014041264154357600225250ustar00rootroot00000000000000 4.0.0 com.iluwatar java-design-patterns 1.9.0 publish-subscribe org.apache.camel camel-core org.apache.camel camel-stream junit junit java-design-patterns-1.9.0/publish-subscribe/src/000077500000000000000000000000001264154357600220005ustar00rootroot00000000000000java-design-patterns-1.9.0/publish-subscribe/src/main/000077500000000000000000000000001264154357600227245ustar00rootroot00000000000000java-design-patterns-1.9.0/publish-subscribe/src/main/java/000077500000000000000000000000001264154357600236455ustar00rootroot00000000000000java-design-patterns-1.9.0/publish-subscribe/src/main/java/com/000077500000000000000000000000001264154357600244235ustar00rootroot00000000000000java-design-patterns-1.9.0/publish-subscribe/src/main/java/com/iluwatar/000077500000000000000000000000001264154357600262535ustar00rootroot00000000000000java-design-patterns-1.9.0/publish-subscribe/src/main/java/com/iluwatar/publish/000077500000000000000000000000001264154357600277215ustar00rootroot00000000000000java-design-patterns-1.9.0/publish-subscribe/src/main/java/com/iluwatar/publish/subscribe/000077500000000000000000000000001264154357600317025ustar00rootroot00000000000000java-design-patterns-1.9.0/publish-subscribe/src/main/java/com/iluwatar/publish/subscribe/App.java000066400000000000000000000037201264154357600332670ustar00rootroot00000000000000package com.iluwatar.publish.subscribe; import org.apache.camel.CamelContext; import org.apache.camel.ProducerTemplate; import org.apache.camel.builder.RouteBuilder; import org.apache.camel.impl.DefaultCamelContext; /** * * There are well-established patterns for implementing broadcasting. The Observer pattern describes * the need to decouple observers from their subject (that is, the originator of the event) so that * the subject can easily provide event notification to all interested observers no matter how many * observers there are (even none). The Publish-Subscribe pattern expands upon Observer by adding * the notion of an event channel for communicating event notifications. *

* A Publish-Subscribe Channel works like this: It has one input channel that splits into multiple * output channels, one for each subscriber. When an event is published into the channel, the * Publish-Subscribe Channel delivers a copy of the message to each of the output channels. Each * output end of the channel has only one subscriber, which is allowed to consume a message only * once. In this way, each subscriber gets the message only once, and consumed copies disappear from * their channels. *

* In this example we use Apache Camel to establish a Publish-Subscribe Channel from "direct-origin" * to "mock:foo", "mock:bar" and "stream:out". * */ public class App { /** * Program entry point */ public static void main(String[] args) throws Exception { CamelContext context = new DefaultCamelContext(); context.addRoutes(new RouteBuilder() { @Override public void configure() throws Exception { from("direct:origin").multicast().to("mock:foo", "mock:bar", "stream:out"); } }); ProducerTemplate template = context.createProducerTemplate(); context.start(); context.getRoutes().stream().forEach((r) -> System.out.println(r)); template.sendBody("direct:origin", "Hello from origin"); context.stop(); } } java-design-patterns-1.9.0/publish-subscribe/src/test/000077500000000000000000000000001264154357600227575ustar00rootroot00000000000000java-design-patterns-1.9.0/publish-subscribe/src/test/java/000077500000000000000000000000001264154357600237005ustar00rootroot00000000000000java-design-patterns-1.9.0/publish-subscribe/src/test/java/com/000077500000000000000000000000001264154357600244565ustar00rootroot00000000000000java-design-patterns-1.9.0/publish-subscribe/src/test/java/com/iluwatar/000077500000000000000000000000001264154357600263065ustar00rootroot00000000000000java-design-patterns-1.9.0/publish-subscribe/src/test/java/com/iluwatar/publish/000077500000000000000000000000001264154357600277545ustar00rootroot00000000000000java-design-patterns-1.9.0/publish-subscribe/src/test/java/com/iluwatar/publish/subscribe/000077500000000000000000000000001264154357600317355ustar00rootroot00000000000000AppTest.java000066400000000000000000000003361264154357600341030ustar00rootroot00000000000000java-design-patterns-1.9.0/publish-subscribe/src/test/java/com/iluwatar/publish/subscribepackage com.iluwatar.publish.subscribe; import org.junit.Test; /** * * Application test * */ public class AppTest { @Test public void test() throws Exception { String[] args = {}; App.main(args); } } java-design-patterns-1.9.0/reactor/000077500000000000000000000000001264154357600172235ustar00rootroot00000000000000java-design-patterns-1.9.0/reactor/etc/000077500000000000000000000000001264154357600177765ustar00rootroot00000000000000java-design-patterns-1.9.0/reactor/etc/reactor.png000066400000000000000000003655541264154357600221650ustar00rootroot00000000000000PNG  IHDR33IDATx]\G6EI̧ Fc*APP + B(vT$ƚDcQgMw;qfgggfw߇}@ @ 5@ @  @ : @ JP@ _$@ TRHI j2v@(A"#APM@Ǝ@ % 5H$r$5H  D B5;@ `Y`֠A@2S\7fL/iݺɹs[C~Պ B5;@ Ԡb>}z9KN-`B/#۸΃JϜ|^9Dy$5H,'.A/@:AjP_Ϛ={Q͛ˑ_(>T7&fQԩdVM&.XTعsAӒ5㬭^zzoyyZAF 8Q%$L/)`66w/yPfG!֬CF>{Xtyc,,7@ ._j{7wӦ! 27w 2DHj@ B3!&^^W+ែ|xpWަ..V\֭(ff?C\acԠ vm%==Tp]iܝ-$5H,'DR@ 1_.JM 2s]|(QQf\f7EiѢ{]~9EW92 08chO@L ʼٳcٱ8;hB4 ظʕCIRpJ$5H !șPӧGv6]n?9nn6[̝[\u|f-?޵OsehkkHGi<Df 7o^b9Dy$5H,h(MR@B˜ iwul׮.60hcѢ S C7k|?9y2 p|ر?~۶M-u_E|,,ml ukPfo>BR͂pҬ^$LGR͂p\Hj@ Bh3A$V4I 4 a)Js!A@ X9$5H,h(U˰=@*Ӄ~gHq#h4€S~D"Q$I@HHƍY,NQNRD"|H6 ;ȑA4Db&mvyL:-4r+bA@I !9L22"p6 |Xq$F,'DRՂf +Ɲ/_wݹ3BJMw!Va&apch3zXna¶30}T篿Al۴iO?ĩE&l]AG{`n{T0j"ɸ4 d*ԠӣG&(ay҄5X\gcc7o><ܸNZ?sf͛{Kr dLb٩/U/f1 -DS0v-& ;:wܸ8V.`dqʔʔ#Jȸ4 d*ԠٳG1yBy9Ç;ٙLH% rnAY6`@ϱc;;[Ł:Ծ~S=lZ[ZꧥE\v-'' q7@tD733F\Ϸ&%VCT/a&asߘֲ9cΥ#G%98;.9fNO o`lܩVDÖ vaa6Y:55s6847Hhjk?G24GuPA\bޙ@53ӓ4 )ΆkݺjK2npJ$5h*ݻ09P\f5ٳcѾLn}&H/qN $mn{2F?^^}M d`>۳"$ߧ~ a-M_ ?@^HƍYj.љ]zjԠq ]pWަ..Vp2nڋ;AٳGjAepM rj²u&Hmp~=XaN [ 9kK\wCӦ3(/äM .QX%s_]كH5 wt1 uf۾}ќ9a6%E׮K~ -] ХKs綢L\XU3y>XJ =:thĺusP2#c)җ/fe޻wѣ#d+Ee6:6rڇ A\6 A|JoT`~]7t7lsZӧG5k5<=ΘfL왛w]Vo,W?5 `7œx$*q= k@q+!0iȰ 7rKp*j 먁VK\oRw81n`njF^@ .\Da:vIf !؅ڤE*̈́aZ5?V͚#Iwׯ'||C(4N} ɸ4 Z`ep;1HӃKR@ѣp 3feK(܋sKօ8N,eǻc ٳ[,-qxW^(@rZTsNl޼=ʊeKr dl:2qg1>y?}ΗJ ?{8yѾ;BYaN "1: MKfvZgώծ]o_s{lm?IDcK:Q'gBf^^< fM^(/\رre L(_ lZqjN2n͂py% LœڵkS֤IɓdXA\2%%uj#A!{Os.#xz:B\] p lmPƍ5ON^ ~xm6eG! <ewb ȼ;9Or dLQۙVN x7nn>3&o58+) ǡ@ ޹s?kv,?;wFȤG%҅uq#z2 :՝IĄO>~&%wGȄg[fӤA\AgL[,1;vl͛zyEzhgy?hJͽu|La 5H$ˇ0iȰL×CGo4/3<"'H]mg|5(A4Y͚7i`@BALHo_\m=xpD9̌:HtiᇵcUԪU7MjPɸ4 mpwJPKprxw ,ŋj׮ժUc6N2sn̳WfXr6l9qc=pܸ}z^% 8$Cr de|ƺv_O×D#7fA 84vŧǚ1\Z"54Ex$EF`QQG͚3fi߬YCg_yr#>^ZZ̳|d/ed,̌.W_I}_K& ]|wpɖ-ܻK[YHjH$a&a'9q#h4ڀyƌY''BB5lNws ?*7'gY& خfD￧<~\d”?: L!=n܀Cml ͽ^\<,Y0:odt^0iȰɸ4 n1_!{utΖz~]7AzuΖlV$PFW MsG󱛛_H_ ܹMڵThNMNNH#~Gj2ԠqW'!-<ƈ4r9a&a'9q#hS$AM"$_.bjPv;={TevӰ dAr Z`؋`GG2nzB&%'/ܹclmbc/"cfݺ9H#se`Ɲ$7緍|AԌ Y#G:?t(^vl`X+'Æ?u^!Jp/\W>ivm޼wF :#~5F|gkP.$F,h'V&I j Ǻnw& -g!=Ƹlc##/)1c!iHO!

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The application can register specific handlers for processing which are called by reactor on specific events. Dispatching of event handlers is performed by an initiation dispatcher, which manages the registered event handlers. Demultiplexing of service requests is performed by a synchronous event demultiplexer. ![Reactor](./etc/reactor.png "Reactor") **Applicability:** Use Reactor pattern when * a server application needs to handle concurrent service requests from multiple clients. * a server application needs to be available for receiving requests from new clients even when handling older client requests. * a server must maximize throughput, minimize latency and use CPU efficiently without blocking. **Real world examples:** * [Spring Reactor](http://projectreactor.io/) **Credits** * [Douglas C. Schmidt - Reactor](https://www.dre.vanderbilt.edu/~schmidt/PDF/Reactor.pdf) * [Pattern Oriented Software Architecture Vol I-V](http://www.amazon.com/Pattern-Oriented-Software-Architecture-Volume-Patterns/dp/0471958697) * [Doug Lea - Scalable IO in Java](http://gee.cs.oswego.edu/dl/cpjslides/nio.pdf) * [Netty](http://netty.io/) java-design-patterns-1.9.0/reactor/pom.xml000066400000000000000000000011501264154357600205350ustar00rootroot00000000000000 4.0.0 com.iluwatar java-design-patterns 1.9.0 reactor junit junit test java-design-patterns-1.9.0/reactor/src/000077500000000000000000000000001264154357600200125ustar00rootroot00000000000000java-design-patterns-1.9.0/reactor/src/main/000077500000000000000000000000001264154357600207365ustar00rootroot00000000000000java-design-patterns-1.9.0/reactor/src/main/java/000077500000000000000000000000001264154357600216575ustar00rootroot00000000000000java-design-patterns-1.9.0/reactor/src/main/java/com/000077500000000000000000000000001264154357600224355ustar00rootroot00000000000000java-design-patterns-1.9.0/reactor/src/main/java/com/iluwatar/000077500000000000000000000000001264154357600242655ustar00rootroot00000000000000java-design-patterns-1.9.0/reactor/src/main/java/com/iluwatar/reactor/000077500000000000000000000000001264154357600257245ustar00rootroot00000000000000java-design-patterns-1.9.0/reactor/src/main/java/com/iluwatar/reactor/app/000077500000000000000000000000001264154357600265045ustar00rootroot00000000000000java-design-patterns-1.9.0/reactor/src/main/java/com/iluwatar/reactor/app/App.java000066400000000000000000000112031264154357600300640ustar00rootroot00000000000000package com.iluwatar.reactor.app; import java.io.IOException; import java.util.ArrayList; import java.util.List; import com.iluwatar.reactor.framework.AbstractNioChannel; import com.iluwatar.reactor.framework.ChannelHandler; import com.iluwatar.reactor.framework.Dispatcher; import com.iluwatar.reactor.framework.NioDatagramChannel; import com.iluwatar.reactor.framework.NioReactor; import com.iluwatar.reactor.framework.NioServerSocketChannel; import com.iluwatar.reactor.framework.ThreadPoolDispatcher; /** * This application demonstrates Reactor pattern. The example demonstrated is a Distributed Logging * Service where it listens on multiple TCP or UDP sockets for incoming log requests. * *

* INTENT
* The Reactor design pattern handles service requests that are delivered concurrently to an * application by one or more clients. The application can register specific handlers for processing * which are called by reactor on specific events. * *

* PROBLEM
* Server applications in a distributed system must handle multiple clients that send them service * requests. Following forces need to be resolved: *

* *

* PARTICIPANTS
*

    *
  • Synchronous Event De-multiplexer
    • {@link NioReactor} plays the role of synchronous event * de-multiplexer. It waits for events on multiple channels registered to it in an event loop. * *

    *

  • Initiation Dispatcher
    • {@link NioReactor} plays this role as the application specific * {@link ChannelHandler}s are registered to the reactor. * *

    *

  • Handle
    • {@link AbstractNioChannel} acts as a handle that is registered to the reactor. * When any events occur on a handle, reactor calls the appropriate handler. * *

    *

  • Event Handler
    • {@link ChannelHandler} acts as an event handler, which is bound to a * channel and is called back when any event occurs on any of its associated handles. Application * logic resides in event handlers. *
* *

* The application utilizes single thread to listen for requests on all ports. It does not create a * separate thread for each client, which provides better scalability under load (number of clients * increase). * *

* The example uses Java NIO framework to implement the Reactor. * */ public class App { private NioReactor reactor; private List channels = new ArrayList<>(); private Dispatcher dispatcher; /** * Creates an instance of App which will use provided dispatcher for dispatching events on * reactor. * * @param dispatcher the dispatcher that will be used to dispatch events. */ public App(Dispatcher dispatcher) { this.dispatcher = dispatcher; } /** * App entry. */ public static void main(String[] args) throws IOException { new App(new ThreadPoolDispatcher(2)).start(); } /** * Starts the NIO reactor. * * @throws IOException if any channel fails to bind. */ public void start() throws IOException { /* * The application can customize its event dispatching mechanism. */ reactor = new NioReactor(dispatcher); /* * This represents application specific business logic that dispatcher will call on appropriate * events. These events are read events in our example. */ LoggingHandler loggingHandler = new LoggingHandler(); /* * Our application binds to multiple channels and uses same logging handler to handle incoming * log requests. */ reactor.registerChannel(tcpChannel(6666, loggingHandler)) .registerChannel(tcpChannel(6667, loggingHandler)) .registerChannel(udpChannel(6668, loggingHandler)).start(); } /** * Stops the NIO reactor. This is a blocking call. * * @throws InterruptedException if interrupted while stopping the reactor. * @throws IOException if any I/O error occurs */ public void stop() throws InterruptedException, IOException { reactor.stop(); dispatcher.stop(); for (AbstractNioChannel channel : channels) { channel.getJavaChannel().close(); } } private AbstractNioChannel tcpChannel(int port, ChannelHandler handler) throws IOException { NioServerSocketChannel channel = new NioServerSocketChannel(port, handler); channel.bind(); channels.add(channel); return channel; } private AbstractNioChannel udpChannel(int port, ChannelHandler handler) throws IOException { NioDatagramChannel channel = new NioDatagramChannel(port, handler); channel.bind(); channels.add(channel); return channel; } } java-design-patterns-1.9.0/reactor/src/main/java/com/iluwatar/reactor/app/AppClient.java000066400000000000000000000114071264154357600312310ustar00rootroot00000000000000package com.iluwatar.reactor.app; import java.io.IOException; import java.io.InputStream; import java.io.OutputStream; import java.io.PrintWriter; import java.net.DatagramPacket; import java.net.DatagramSocket; import java.net.InetAddress; import java.net.InetSocketAddress; import java.net.Socket; import java.net.UnknownHostException; import java.util.concurrent.ExecutorService; import java.util.concurrent.Executors; import java.util.concurrent.TimeUnit; /** * Represents the clients of Reactor pattern. Multiple clients are run concurrently and send logging * requests to Reactor. */ public class AppClient { private final ExecutorService service = Executors.newFixedThreadPool(4); /** * App client entry. * * @throws IOException if any I/O error occurs. */ public static void main(String[] args) throws IOException { AppClient appClient = new AppClient(); appClient.start(); } /** * Starts the logging clients. * * @throws IOException if any I/O error occurs. */ public void start() throws IOException { service.execute(new TcpLoggingClient("Client 1", 6666)); service.execute(new TcpLoggingClient("Client 2", 6667)); service.execute(new UdpLoggingClient("Client 3", 6668)); service.execute(new UdpLoggingClient("Client 4", 6668)); } /** * Stops logging clients. This is a blocking call. */ public void stop() { service.shutdown(); if (!service.isTerminated()) { service.shutdownNow(); try { service.awaitTermination(1000, TimeUnit.SECONDS); } catch (InterruptedException e) { e.printStackTrace(); } } } private static void artificialDelayOf(long millis) { try { Thread.sleep(millis); } catch (InterruptedException e) { e.printStackTrace(); } } /** * A logging client that sends requests to Reactor on TCP socket. */ static class TcpLoggingClient implements Runnable { private final int serverPort; private final String clientName; /** * Creates a new TCP logging client. * * @param clientName the name of the client to be sent in logging requests. * @param port the port on which client will send logging requests. */ public TcpLoggingClient(String clientName, int serverPort) { this.clientName = clientName; this.serverPort = serverPort; } public void run() { try (Socket socket = new Socket(InetAddress.getLocalHost(), serverPort)) { OutputStream outputStream = socket.getOutputStream(); PrintWriter writer = new PrintWriter(outputStream); sendLogRequests(writer, socket.getInputStream()); } catch (IOException e) { e.printStackTrace(); throw new RuntimeException(e); } } private void sendLogRequests(PrintWriter writer, InputStream inputStream) throws IOException { for (int i = 0; i < 4; i++) { writer.println(clientName + " - Log request: " + i); writer.flush(); byte[] data = new byte[1024]; int read = inputStream.read(data, 0, data.length); if (read == 0) { System.out.println("Read zero bytes"); } else { System.out.println(new String(data, 0, read)); } artificialDelayOf(100); } } } /** * A logging client that sends requests to Reactor on UDP socket. */ static class UdpLoggingClient implements Runnable { private final String clientName; private final InetSocketAddress remoteAddress; /** * Creates a new UDP logging client. * * @param clientName the name of the client to be sent in logging requests. * @param port the port on which client will send logging requests. * @throws UnknownHostException if localhost is unknown */ public UdpLoggingClient(String clientName, int port) throws UnknownHostException { this.clientName = clientName; this.remoteAddress = new InetSocketAddress(InetAddress.getLocalHost(), port); } @Override public void run() { try (DatagramSocket socket = new DatagramSocket()) { for (int i = 0; i < 4; i++) { String message = clientName + " - Log request: " + i; DatagramPacket request = new DatagramPacket(message.getBytes(), message.getBytes().length, remoteAddress); socket.send(request); byte[] data = new byte[1024]; DatagramPacket reply = new DatagramPacket(data, data.length); socket.receive(reply); if (reply.getLength() == 0) { System.out.println("Read zero bytes"); } else { System.out.println(new String(reply.getData(), 0, reply.getLength())); } artificialDelayOf(100); } } catch (IOException e1) { e1.printStackTrace(); } } } } java-design-patterns-1.9.0/reactor/src/main/java/com/iluwatar/reactor/app/LoggingHandler.java000066400000000000000000000040451264154357600322360ustar00rootroot00000000000000package com.iluwatar.reactor.app; import java.nio.ByteBuffer; import java.nio.channels.SelectionKey; import com.iluwatar.reactor.framework.AbstractNioChannel; import com.iluwatar.reactor.framework.ChannelHandler; import com.iluwatar.reactor.framework.NioDatagramChannel.DatagramPacket; /** * Logging server application logic. It logs the incoming requests on standard console and returns a * canned acknowledgement back to the remote peer. */ public class LoggingHandler implements ChannelHandler { private static final byte[] ACK = "Data logged successfully".getBytes(); /** * Decodes the received data and logs it on standard console. */ @Override public void handleChannelRead(AbstractNioChannel channel, Object readObject, SelectionKey key) { /* * As this handler is attached with both TCP and UDP channels we need to check whether the data * received is a ByteBuffer (from TCP channel) or a DatagramPacket (from UDP channel). */ if (readObject instanceof ByteBuffer) { doLogging(((ByteBuffer) readObject)); sendReply(channel, key); } else if (readObject instanceof DatagramPacket) { DatagramPacket datagram = (DatagramPacket) readObject; doLogging(datagram.getData()); sendReply(channel, datagram, key); } else { throw new IllegalStateException("Unknown data received"); } } private void sendReply(AbstractNioChannel channel, DatagramPacket incomingPacket, SelectionKey key) { /* * Create a reply acknowledgement datagram packet setting the receiver to the sender of incoming * message. */ DatagramPacket replyPacket = new DatagramPacket(ByteBuffer.wrap(ACK)); replyPacket.setReceiver(incomingPacket.getSender()); channel.write(replyPacket, key); } private void sendReply(AbstractNioChannel channel, SelectionKey key) { ByteBuffer buffer = ByteBuffer.wrap(ACK); channel.write(buffer, key); } private void doLogging(ByteBuffer data) { // assuming UTF-8 :( System.out.println(new String(data.array(), 0, data.limit())); } } java-design-patterns-1.9.0/reactor/src/main/java/com/iluwatar/reactor/framework/000077500000000000000000000000001264154357600277215ustar00rootroot00000000000000AbstractNioChannel.java000066400000000000000000000115511264154357600342120ustar00rootroot00000000000000java-design-patterns-1.9.0/reactor/src/main/java/com/iluwatar/reactor/frameworkpackage com.iluwatar.reactor.framework; import java.io.IOException; import java.nio.channels.SelectableChannel; import java.nio.channels.SelectionKey; import java.nio.channels.Selector; import java.util.Map; import java.util.Queue; import java.util.concurrent.ConcurrentHashMap; import java.util.concurrent.ConcurrentLinkedQueue; /** * This represents the Handle of Reactor pattern. These are resources managed by OS which can * be submitted to {@link NioReactor}. * *

* This class serves has the responsibility of reading the data when a read event occurs and writing * the data back when the channel is writable. It leaves the reading and writing of data on the * concrete implementation. It provides a block writing mechanism wherein when any * {@link ChannelHandler} wants to write data back, it queues the data in pending write queue and * clears it in block manner. This provides better throughput. */ public abstract class AbstractNioChannel { private final SelectableChannel channel; private final ChannelHandler handler; private final Map> channelToPendingWrites = new ConcurrentHashMap<>(); private NioReactor reactor; /** * Creates a new channel. * * @param handler which will handle events occurring on this channel. * @param channel a NIO channel to be wrapped. */ public AbstractNioChannel(ChannelHandler handler, SelectableChannel channel) { this.handler = handler; this.channel = channel; } /** * Injects the reactor in this channel. */ void setReactor(NioReactor reactor) { this.reactor = reactor; } /** * @return the wrapped NIO channel. */ public SelectableChannel getJavaChannel() { return channel; } /** * The operation in which the channel is interested, this operation is provided to * {@link Selector}. * * @return interested operation. * @see SelectionKey */ public abstract int getInterestedOps(); /** * Binds the channel on provided port. * * @throws IOException if any I/O error occurs. */ public abstract void bind() throws IOException; /** * Reads the data using the key and returns the read data. The underlying channel should be * fetched using {@link SelectionKey#channel()}. * * @param key the key on which read event occurred. * @return data read. * @throws IOException if any I/O error occurs. */ public abstract Object read(SelectionKey key) throws IOException; /** * @return the handler associated with this channel. */ public ChannelHandler getHandler() { return handler; } /* * Called from the context of reactor thread when the key becomes writable. The channel writes the * whole pending block of data at once. */ void flush(SelectionKey key) throws IOException { Queue pendingWrites = channelToPendingWrites.get(key.channel()); while (true) { Object pendingWrite = pendingWrites.poll(); if (pendingWrite == null) { // We don't have anything more to write so channel is interested in reading more data reactor.changeOps(key, SelectionKey.OP_READ); break; } // ask the concrete channel to make sense of data and write it to java channel doWrite(pendingWrite, key); } } /** * Writes the data to the channel. * * @param pendingWrite the data to be written on channel. * @param key the key which is writable. * @throws IOException if any I/O error occurs. */ protected abstract void doWrite(Object pendingWrite, SelectionKey key) throws IOException; /** * Queues the data for writing. The data is not guaranteed to be written on underlying channel * when this method returns. It will be written when the channel is flushed. * *

* This method is used by the {@link ChannelHandler} to send reply back to the client.
* Example: * * 

   * 
   * {@literal @}Override
   * public void handleChannelRead(AbstractNioChannel channel, Object readObject, SelectionKey key) {
   *   byte[] data = ((ByteBuffer)readObject).array();
   *   ByteBuffer buffer = ByteBuffer.wrap("Server reply".getBytes());
   *   channel.write(buffer, key);
   * }
   * 
   *
* * @param data the data to be written on underlying channel. * @param key the key which is writable. */ public void write(Object data, SelectionKey key) { Queue pendingWrites = this.channelToPendingWrites.get(key.channel()); if (pendingWrites == null) { synchronized (this.channelToPendingWrites) { pendingWrites = this.channelToPendingWrites.get(key.channel()); if (pendingWrites == null) { pendingWrites = new ConcurrentLinkedQueue<>(); this.channelToPendingWrites.put(key.channel(), pendingWrites); } } } pendingWrites.add(data); reactor.changeOps(key, SelectionKey.OP_WRITE); } } java-design-patterns-1.9.0/reactor/src/main/java/com/iluwatar/reactor/framework/ChannelHandler.java000066400000000000000000000015301264154357600334310ustar00rootroot00000000000000package com.iluwatar.reactor.framework; import java.nio.channels.SelectionKey; /** * Represents the EventHandler of Reactor pattern. It handles the incoming events dispatched * to it by the {@link Dispatcher}. This is where the application logic resides. * *

* A {@link ChannelHandler} can be associated with one or many {@link AbstractNioChannel}s, and * whenever an event occurs on any of the associated channels, the handler is notified of the event. */ public interface ChannelHandler { /** * Called when the {@code channel} receives some data from remote peer. * * @param channel the channel from which the data was received. * @param readObject the data read. * @param key the key on which read event occurred. */ void handleChannelRead(AbstractNioChannel channel, Object readObject, SelectionKey key); } java-design-patterns-1.9.0/reactor/src/main/java/com/iluwatar/reactor/framework/Dispatcher.java000066400000000000000000000032131264154357600326510ustar00rootroot00000000000000package com.iluwatar.reactor.framework; import java.nio.channels.SelectionKey; /** * Represents the event dispatching strategy. When {@link NioReactor} senses any event on the * registered {@link AbstractNioChannel}s then it de-multiplexes the event type, read or write or * connect, and then calls the {@link Dispatcher} to dispatch the read events. This decouples the * I/O processing from application specific processing.
* Dispatcher should call the {@link ChannelHandler} associated with the channel on which event * occurred. * *

* The application can customize the way in which event is dispatched such as using the reactor * thread to dispatch event to channels or use a worker pool to do the non I/O processing. * * @see SameThreadDispatcher * @see ThreadPoolDispatcher */ public interface Dispatcher { /** * This hook method is called when read event occurs on particular channel. The data read is * provided in readObject. The implementation should dispatch this read event to the * associated {@link ChannelHandler} of channel. * *

* The type of readObject depends on the channel on which data was received. * * @param channel on which read event occurred * @param readObject object read by channel * @param key on which event occurred */ void onChannelReadEvent(AbstractNioChannel channel, Object readObject, SelectionKey key); /** * Stops dispatching events and cleans up any acquired resources such as threads. * * @throws InterruptedException if interrupted while stopping dispatcher. */ void stop() throws InterruptedException; } NioDatagramChannel.java000066400000000000000000000107421264154357600341700ustar00rootroot00000000000000java-design-patterns-1.9.0/reactor/src/main/java/com/iluwatar/reactor/frameworkpackage com.iluwatar.reactor.framework; import java.io.IOException; import java.net.InetAddress; import java.net.InetSocketAddress; import java.net.SocketAddress; import java.nio.ByteBuffer; import java.nio.channels.DatagramChannel; import java.nio.channels.SelectionKey; /** * A wrapper over {@link DatagramChannel} which can read and write data on a DatagramChannel. */ public class NioDatagramChannel extends AbstractNioChannel { private final int port; /** * Creates a {@link DatagramChannel} which will bind at provided port and use handler * to handle incoming events on this channel. *

* Note the constructor does not bind the socket, {@link #bind()} method should be called for * binding the socket. * * @param port the port to be bound to listen for incoming datagram requests. * @param handler the handler to be used for handling incoming requests on this channel. * @throws IOException if any I/O error occurs. */ public NioDatagramChannel(int port, ChannelHandler handler) throws IOException { super(handler, DatagramChannel.open()); this.port = port; } @Override public int getInterestedOps() { /* * there is no need to accept connections in UDP, so the channel shows interest in reading data. */ return SelectionKey.OP_READ; } /** * Reads and returns a {@link DatagramPacket} from the underlying channel. * * @return the datagram packet read having the sender address. */ @Override public DatagramPacket read(SelectionKey key) throws IOException { ByteBuffer buffer = ByteBuffer.allocate(1024); SocketAddress sender = ((DatagramChannel) key.channel()).receive(buffer); /* * It is required to create a DatagramPacket because we need to preserve which socket address * acts as destination for sending reply packets. */ buffer.flip(); DatagramPacket packet = new DatagramPacket(buffer); packet.setSender(sender); return packet; } /** * @return the underlying datagram channel. */ @Override public DatagramChannel getJavaChannel() { return (DatagramChannel) super.getJavaChannel(); } /** * Binds UDP socket on the provided port. * * @throws IOException if any I/O error occurs. */ @Override public void bind() throws IOException { getJavaChannel().socket().bind(new InetSocketAddress(InetAddress.getLocalHost(), port)); getJavaChannel().configureBlocking(false); System.out.println("Bound UDP socket at port: " + port); } /** * Writes the pending {@link DatagramPacket} to the underlying channel sending data to the * intended receiver of the packet. */ @Override protected void doWrite(Object pendingWrite, SelectionKey key) throws IOException { DatagramPacket pendingPacket = (DatagramPacket) pendingWrite; getJavaChannel().send(pendingPacket.getData(), pendingPacket.getReceiver()); } /** * Writes the outgoing {@link DatagramPacket} to the channel. The intended receiver of the * datagram packet must be set in the data using * {@link DatagramPacket#setReceiver(SocketAddress)}. */ @Override public void write(Object data, SelectionKey key) { super.write(data, key); } /** * Container of data used for {@link NioDatagramChannel} to communicate with remote peer. */ public static class DatagramPacket { private SocketAddress sender; private ByteBuffer data; private SocketAddress receiver; /** * Creates a container with underlying data. * * @param data the underlying message to be written on channel. */ public DatagramPacket(ByteBuffer data) { this.data = data; } /** * @return the sender address. */ public SocketAddress getSender() { return sender; } /** * Sets the sender address of this packet. * * @param sender the sender address. */ public void setSender(SocketAddress sender) { this.sender = sender; } /** * @return the receiver address. */ public SocketAddress getReceiver() { return receiver; } /** * Sets the intended receiver address. This must be set when writing to the channel. * * @param receiver the receiver address. */ public void setReceiver(SocketAddress receiver) { this.receiver = receiver; } /** * @return the underlying message that will be written on channel. */ public ByteBuffer getData() { return data; } } } java-design-patterns-1.9.0/reactor/src/main/java/com/iluwatar/reactor/framework/NioReactor.java000066400000000000000000000177221264154357600326420ustar00rootroot00000000000000package com.iluwatar.reactor.framework; import java.io.IOException; import java.nio.channels.SelectionKey; import java.nio.channels.Selector; import java.nio.channels.ServerSocketChannel; import java.nio.channels.SocketChannel; import java.util.Iterator; import java.util.Queue; import java.util.Set; import java.util.concurrent.ConcurrentLinkedQueue; import java.util.concurrent.ExecutorService; import java.util.concurrent.Executors; import java.util.concurrent.TimeUnit; /** * This class acts as Synchronous Event De-multiplexer and Initiation Dispatcher of Reactor pattern. Multiple handles * i.e. {@link AbstractNioChannel}s can be registered to the reactor and it blocks for events from all these handles. * Whenever an event occurs on any of the registered handles, it synchronously de-multiplexes the event which can be any * of read, write or accept, and dispatches the event to the appropriate {@link ChannelHandler} using the * {@link Dispatcher}. * *

* Implementation: A NIO reactor runs in its own thread when it is started using {@link #start()} method. * {@link NioReactor} uses {@link Selector} for realizing Synchronous Event De-multiplexing. * *

* NOTE: This is one of the ways to implement NIO reactor and it does not take care of all possible edge cases which are * required in a real application. This implementation is meant to demonstrate the fundamental concepts that lie behind * Reactor pattern. */ public class NioReactor { private final Selector selector; private final Dispatcher dispatcher; /** * All the work of altering the SelectionKey operations and Selector operations are performed in the context of main * event loop of reactor. So when any channel needs to change its readability or writability, a new command is added * in the command queue and then the event loop picks up the command and executes it in next iteration. */ private final Queue pendingCommands = new ConcurrentLinkedQueue<>(); private final ExecutorService reactorMain = Executors.newSingleThreadExecutor(); /** * Creates a reactor which will use provided {@code dispatcher} to dispatch events. The application can provide * various implementations of dispatcher which suits its needs. * * @param dispatcher * a non-null dispatcher used to dispatch events on registered channels. * @throws IOException * if any I/O error occurs. */ public NioReactor(Dispatcher dispatcher) throws IOException { this.dispatcher = dispatcher; this.selector = Selector.open(); } /** * Starts the reactor event loop in a new thread. * * @throws IOException * if any I/O error occurs. */ public void start() throws IOException { reactorMain.execute(() -> { try { System.out.println("Reactor started, waiting for events..."); eventLoop(); } catch (IOException e) { e.printStackTrace(); } }); } /** * Stops the reactor and related resources such as dispatcher. * * @throws InterruptedException * if interrupted while stopping the reactor. * @throws IOException * if any I/O error occurs. */ public void stop() throws InterruptedException, IOException { reactorMain.shutdownNow(); selector.wakeup(); reactorMain.awaitTermination(4, TimeUnit.SECONDS); selector.close(); } /** * Registers a new channel (handle) with this reactor. Reactor will start waiting for events on this channel and * notify of any events. While registering the channel the reactor uses {@link AbstractNioChannel#getInterestedOps()} * to know about the interested operation of this channel. * * @param channel * a new channel on which reactor will wait for events. The channel must be bound prior to being registered. * @return this * @throws IOException * if any I/O error occurs. */ public NioReactor registerChannel(AbstractNioChannel channel) throws IOException { SelectionKey key = channel.getJavaChannel().register(selector, channel.getInterestedOps()); key.attach(channel); channel.setReactor(this); return this; } private void eventLoop() throws IOException { while (true) { // honor interrupt request if (Thread.interrupted()) { break; } // honor any pending commands first processPendingCommands(); /* * Synchronous event de-multiplexing happens here, this is blocking call which returns when it is possible to * initiate non-blocking operation on any of the registered channels. */ selector.select(); /* * Represents the events that have occurred on registered handles. */ Set keys = selector.selectedKeys(); Iterator iterator = keys.iterator(); while (iterator.hasNext()) { SelectionKey key = iterator.next(); if (!key.isValid()) { iterator.remove(); continue; } processKey(key); } keys.clear(); } } private void processPendingCommands() { Iterator iterator = pendingCommands.iterator(); while (iterator.hasNext()) { Runnable command = iterator.next(); command.run(); iterator.remove(); } } /* * Initiation dispatcher logic, it checks the type of event and notifier application specific event handler to handle * the event. */ private void processKey(SelectionKey key) throws IOException { if (key.isAcceptable()) { onChannelAcceptable(key); } else if (key.isReadable()) { onChannelReadable(key); } else if (key.isWritable()) { onChannelWritable(key); } } private void onChannelWritable(SelectionKey key) throws IOException { AbstractNioChannel channel = (AbstractNioChannel) key.attachment(); channel.flush(key); } private void onChannelReadable(SelectionKey key) { try { // reads the incoming data in context of reactor main loop. Can this be improved? Object readObject = ((AbstractNioChannel) key.attachment()).read(key); dispatchReadEvent(key, readObject); } catch (IOException e) { try { key.channel().close(); } catch (IOException e1) { e1.printStackTrace(); } } } /* * Uses the application provided dispatcher to dispatch events to application handler. */ private void dispatchReadEvent(SelectionKey key, Object readObject) { dispatcher.onChannelReadEvent((AbstractNioChannel) key.attachment(), readObject, key); } private void onChannelAcceptable(SelectionKey key) throws IOException { ServerSocketChannel serverSocketChannel = (ServerSocketChannel) key.channel(); SocketChannel socketChannel = serverSocketChannel.accept(); socketChannel.configureBlocking(false); SelectionKey readKey = socketChannel.register(selector, SelectionKey.OP_READ); readKey.attach(key.attachment()); } /** * Queues the change of operations request of a channel, which will change the interested operations of the channel * sometime in future. *

* This is a non-blocking method and does not guarantee that the operations have changed when this method returns. * * @param key * the key for which operations have to be changed. * @param interestedOps * the new interest operations. */ public void changeOps(SelectionKey key, int interestedOps) { pendingCommands.add(new ChangeKeyOpsCommand(key, interestedOps)); selector.wakeup(); } /** * A command that changes the interested operations of the key provided. */ class ChangeKeyOpsCommand implements Runnable { private SelectionKey key; private int interestedOps; public ChangeKeyOpsCommand(SelectionKey key, int interestedOps) { this.key = key; this.interestedOps = interestedOps; } public void run() { key.interestOps(interestedOps); } @Override public String toString() { return "Change of ops to: " + interestedOps; } } } NioServerSocketChannel.java000066400000000000000000000056361264154357600350750ustar00rootroot00000000000000java-design-patterns-1.9.0/reactor/src/main/java/com/iluwatar/reactor/frameworkpackage com.iluwatar.reactor.framework; import java.io.IOException; import java.net.InetAddress; import java.net.InetSocketAddress; import java.nio.ByteBuffer; import java.nio.channels.SelectionKey; import java.nio.channels.ServerSocketChannel; import java.nio.channels.SocketChannel; /** * A wrapper over {@link NioServerSocketChannel} which can read and write data on a * {@link SocketChannel}. */ public class NioServerSocketChannel extends AbstractNioChannel { private final int port; /** * Creates a {@link ServerSocketChannel} which will bind at provided port and use * handler to handle incoming events on this channel. *

* Note the constructor does not bind the socket, {@link #bind()} method should be called for * binding the socket. * * @param port the port on which channel will be bound to accept incoming connection requests. * @param handler the handler that will handle incoming requests on this channel. * @throws IOException if any I/O error occurs. */ public NioServerSocketChannel(int port, ChannelHandler handler) throws IOException { super(handler, ServerSocketChannel.open()); this.port = port; } @Override public int getInterestedOps() { // being a server socket channel it is interested in accepting connection from remote peers. return SelectionKey.OP_ACCEPT; } /** * @return the underlying {@link ServerSocketChannel}. */ @Override public ServerSocketChannel getJavaChannel() { return (ServerSocketChannel) super.getJavaChannel(); } /** * Reads and returns {@link ByteBuffer} from the underlying {@link SocketChannel} represented by * the key. Due to the fact that there is a dedicated channel for each client * connection we don't need to store the sender. */ @Override public ByteBuffer read(SelectionKey key) throws IOException { SocketChannel socketChannel = (SocketChannel) key.channel(); ByteBuffer buffer = ByteBuffer.allocate(1024); int read = socketChannel.read(buffer); buffer.flip(); if (read == -1) { throw new IOException("Socket closed"); } return buffer; } /** * Binds TCP socket on the provided port. * * @throws IOException if any I/O error occurs. */ @Override public void bind() throws IOException { ((ServerSocketChannel) getJavaChannel()).socket().bind( new InetSocketAddress(InetAddress.getLocalHost(), port)); ((ServerSocketChannel) getJavaChannel()).configureBlocking(false); System.out.println("Bound TCP socket at port: " + port); } /** * Writes the pending {@link ByteBuffer} to the underlying channel sending data to the intended * receiver of the packet. */ @Override protected void doWrite(Object pendingWrite, SelectionKey key) throws IOException { ByteBuffer pendingBuffer = (ByteBuffer) pendingWrite; ((SocketChannel) key.channel()).write(pendingBuffer); } } SameThreadDispatcher.java000066400000000000000000000021431264154357600345310ustar00rootroot00000000000000java-design-patterns-1.9.0/reactor/src/main/java/com/iluwatar/reactor/frameworkpackage com.iluwatar.reactor.framework; import java.nio.channels.SelectionKey; /** * Dispatches the events in the context of caller thread. This implementation is a good fit for * small applications where there are limited clients. Using this implementation limits the * scalability because the I/O thread performs the application specific processing. * *

* For better performance use {@link ThreadPoolDispatcher}. * * @see ThreadPoolDispatcher */ public class SameThreadDispatcher implements Dispatcher { /** * Dispatches the read event in the context of caller thread.
* Note this is a blocking call. It returns only after the associated handler has handled the read * event. */ @Override public void onChannelReadEvent(AbstractNioChannel channel, Object readObject, SelectionKey key) { /* * Calls the associated handler to notify the read event where application specific code * resides. */ channel.getHandler().handleChannelRead(channel, readObject, key); } /** * No resources to free. */ @Override public void stop() { // no-op } } ThreadPoolDispatcher.java000066400000000000000000000030361264154357600345570ustar00rootroot00000000000000java-design-patterns-1.9.0/reactor/src/main/java/com/iluwatar/reactor/frameworkpackage com.iluwatar.reactor.framework; import java.nio.channels.SelectionKey; import java.util.concurrent.ExecutorService; import java.util.concurrent.Executors; import java.util.concurrent.TimeUnit; /** * An implementation that uses a pool of worker threads to dispatch the events. This provides better * scalability as the application specific processing is not performed in the context of I/O * (reactor) thread. */ public class ThreadPoolDispatcher implements Dispatcher { private final ExecutorService executorService; /** * Creates a pooled dispatcher with tunable pool size. * * @param poolSize number of pooled threads */ public ThreadPoolDispatcher(int poolSize) { this.executorService = Executors.newFixedThreadPool(poolSize); } /** * Submits the work of dispatching the read event to worker pool, where it gets picked up by * worker threads.
* Note that this is a non-blocking call and returns immediately. It is not guaranteed that the * event has been handled by associated handler. */ @Override public void onChannelReadEvent(AbstractNioChannel channel, Object readObject, SelectionKey key) { executorService.execute(() -> channel.getHandler().handleChannelRead(channel, readObject, key)); } /** * Stops the pool of workers. * * @throws InterruptedException if interrupted while stopping pool of workers. */ @Override public void stop() throws InterruptedException { executorService.shutdown(); executorService.awaitTermination(4, TimeUnit.SECONDS); } } java-design-patterns-1.9.0/reactor/src/test/000077500000000000000000000000001264154357600207715ustar00rootroot00000000000000java-design-patterns-1.9.0/reactor/src/test/java/000077500000000000000000000000001264154357600217125ustar00rootroot00000000000000java-design-patterns-1.9.0/reactor/src/test/java/com/000077500000000000000000000000001264154357600224705ustar00rootroot00000000000000java-design-patterns-1.9.0/reactor/src/test/java/com/iluwatar/000077500000000000000000000000001264154357600243205ustar00rootroot00000000000000java-design-patterns-1.9.0/reactor/src/test/java/com/iluwatar/reactor/000077500000000000000000000000001264154357600257575ustar00rootroot00000000000000java-design-patterns-1.9.0/reactor/src/test/java/com/iluwatar/reactor/app/000077500000000000000000000000001264154357600265375ustar00rootroot00000000000000java-design-patterns-1.9.0/reactor/src/test/java/com/iluwatar/reactor/app/AppTest.java000066400000000000000000000032221264154357600307610ustar00rootroot00000000000000package com.iluwatar.reactor.app; import java.io.IOException; import org.junit.Test; import com.iluwatar.reactor.framework.SameThreadDispatcher; import com.iluwatar.reactor.framework.ThreadPoolDispatcher; /** * * This class tests the Distributed Logging service by starting a Reactor and then sending it * concurrent logging requests using multiple clients. */ public class AppTest { /** * Test the application using pooled thread dispatcher. * * @throws IOException if any I/O error occurs. * @throws InterruptedException if interrupted while stopping the application. */ @Test public void testAppUsingThreadPoolDispatcher() throws IOException, InterruptedException { App app = new App(new ThreadPoolDispatcher(2)); app.start(); AppClient client = new AppClient(); client.start(); // allow clients to send requests. Artificial delay. try { Thread.sleep(2000); } catch (InterruptedException e) { e.printStackTrace(); } client.stop(); app.stop(); } /** * Test the application using same thread dispatcher. * * @throws IOException if any I/O error occurs. * @throws InterruptedException if interrupted while stopping the application. */ @Test public void testAppUsingSameThreadDispatcher() throws IOException, InterruptedException { App app = new App(new SameThreadDispatcher()); app.start(); AppClient client = new AppClient(); client.start(); // allow clients to send requests. 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The Repository pattern is especially useful in systems where number of domain classes is large or heavy querying is utilized. ![alt text](./etc/repository.png "Repository") **Applicability:** Use the Repository pattern when * the number of domain objects is large * you want to avoid duplication of query code * you want to keep the database querying code in single place * you have multiple data sources **Real world examples:** * [Spring Data](http://projects.spring.io/spring-data/) **Credits:** * [Don’t use DAO, use Repository](http://thinkinginobjects.com/2012/08/26/dont-use-dao-use-repository/) * [Advanced Spring Data JPA - Specifications and Querydsl](https://spring.io/blog/2011/04/26/advanced-spring-data-jpa-specifications-and-querydsl/) java-design-patterns-1.9.0/repository/pom.xml000066400000000000000000000027511264154357600213250ustar00rootroot00000000000000 4.0.0 com.iluwatar java-design-patterns 1.9.0 repository org.springframework spring-test org.springframework.data spring-data-jpa org.hibernate hibernate-entitymanager commons-dbcp commons-dbcp com.h2database h2 junit junit test com.google.guava guava java-design-patterns-1.9.0/repository/src/000077500000000000000000000000001264154357600205725ustar00rootroot00000000000000java-design-patterns-1.9.0/repository/src/main/000077500000000000000000000000001264154357600215165ustar00rootroot00000000000000java-design-patterns-1.9.0/repository/src/main/java/000077500000000000000000000000001264154357600224375ustar00rootroot00000000000000java-design-patterns-1.9.0/repository/src/main/java/com/000077500000000000000000000000001264154357600232155ustar00rootroot00000000000000java-design-patterns-1.9.0/repository/src/main/java/com/iluwatar/000077500000000000000000000000001264154357600250455ustar00rootroot00000000000000java-design-patterns-1.9.0/repository/src/main/java/com/iluwatar/repository/000077500000000000000000000000001264154357600272645ustar00rootroot00000000000000java-design-patterns-1.9.0/repository/src/main/java/com/iluwatar/repository/App.java000066400000000000000000000055561264154357600306620ustar00rootroot00000000000000package com.iluwatar.repository; import java.util.List; import org.springframework.context.support.ClassPathXmlApplicationContext; /** * Repository pattern mediates between the domain and data mapping layers using a collection-like * interface for accessing domain objects. A system with complex domain model often benefits from a * layer that isolates domain objects from the details of the database access code and in such * systems it can be worthwhile to build another layer of abstraction over the mapping layer where * query construction code is concentrated. This becomes more important when there are a large * number of domain classes or heavy querying. In these cases particularly, adding this layer helps * minimize duplicate query logic. *

* In this example we utilize Spring Data to automatically generate a repository for us from the * {@link Person} domain object. Using the {@link PersonRepository} we perform CRUD operations on * the entity, moreover, the query by {@link org.springframework.data.jpa.domain.Specification} are * also performed. Underneath we have configured in-memory H2 database for which schema is created * and dropped on each run. */ public class App { /** * Program entry point * * @param args * command line args */ public static void main(String[] args) { ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext( "applicationContext.xml"); PersonRepository repository = context.getBean(PersonRepository.class); Person peter = new Person("Peter", "Sagan", 17); Person nasta = new Person("Nasta", "Kuzminova", 25); Person john = new Person("John", "lawrence", 35); Person terry = new Person("Terry", "Law", 36); // Add new Person records repository.save(peter); repository.save(nasta); repository.save(john); repository.save(terry); // Count Person records System.out.println("Count Person records: " + repository.count()); // Print all records List persons = (List) repository.findAll(); for (Person person : persons) { System.out.println(person); } // Update Person nasta.setName("Barbora"); nasta.setSurname("Spotakova"); repository.save(nasta); System.out.println("Find by id 2: " + repository.findOne(2L)); // Remove record from Person repository.delete(2L); // count records System.out.println("Count Person records: " + repository.count()); // find by name Person p = repository.findOne(new PersonSpecifications.NameEqualSpec("John")); System.out.println("Find by John is " + p); // find by age persons = repository.findAll(new PersonSpecifications.AgeBetweenSpec(20, 40)); System.out.println("Find Person with age between 20,40: "); for (Person person : persons) { System.out.println(person); } context.close(); } } java-design-patterns-1.9.0/repository/src/main/java/com/iluwatar/repository/AppConfig.java000066400000000000000000000077421264154357600320070ustar00rootroot00000000000000package com.iluwatar.repository; import java.sql.SQLException; import java.util.List; import java.util.Properties; import javax.sql.DataSource; import org.apache.commons.dbcp.BasicDataSource; import org.hibernate.jpa.HibernatePersistenceProvider; import org.springframework.context.annotation.AnnotationConfigApplicationContext; import org.springframework.context.annotation.Bean; import org.springframework.data.jpa.repository.config.EnableJpaRepositories; import org.springframework.orm.jpa.JpaTransactionManager; import org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean; /** * This is the same example as in {@link App} but with annotations based * configuration for Spring. * */ @EnableJpaRepositories public class AppConfig { /** * Creation of H2 db * * @return A new Instance of DataSource */ @Bean(destroyMethod = "close") public DataSource dataSource() { BasicDataSource basicDataSource = new BasicDataSource(); basicDataSource.setDriverClassName("org.h2.Driver"); basicDataSource.setUrl("jdbc:h2:~/databases/person"); basicDataSource.setUsername("sa"); basicDataSource.setPassword("sa"); return (DataSource) basicDataSource; } /** * Factory to create a especific instance of Entity Manager */ @Bean public LocalContainerEntityManagerFactoryBean entityManagerFactory() { LocalContainerEntityManagerFactoryBean entityManager = new LocalContainerEntityManagerFactoryBean(); entityManager.setDataSource(dataSource()); entityManager.setPackagesToScan("com.iluwatar"); entityManager.setPersistenceProvider(new HibernatePersistenceProvider()); entityManager.setJpaProperties(jpaProperties()); return entityManager; } /** * Properties for Jpa */ private Properties jpaProperties() { Properties properties = new Properties(); properties.setProperty("hibernate.dialect", "org.hibernate.dialect.H2Dialect"); properties.setProperty("hibernate.hbm2ddl.auto", "create-drop"); return properties; } /** * Get transaction manager */ @Bean public JpaTransactionManager transactionManager() throws SQLException { JpaTransactionManager transactionManager = new JpaTransactionManager(); transactionManager.setEntityManagerFactory(entityManagerFactory().getObject()); return transactionManager; } /** * Program entry point * * @param args * command line args */ public static void main(String[] args) { AnnotationConfigApplicationContext context = new AnnotationConfigApplicationContext( AppConfig.class); PersonRepository repository = context.getBean(PersonRepository.class); Person peter = new Person("Peter", "Sagan", 17); Person nasta = new Person("Nasta", "Kuzminova", 25); Person john = new Person("John", "lawrence", 35); Person terry = new Person("Terry", "Law", 36); // Add new Person records repository.save(peter); repository.save(nasta); repository.save(john); repository.save(terry); // Count Person records System.out.println("Count Person records: " + repository.count()); // Print all records List persons = (List) repository.findAll(); for (Person person : persons) { System.out.println(person); } // Update Person nasta.setName("Barbora"); nasta.setSurname("Spotakova"); repository.save(nasta); System.out.println("Find by id 2: " + repository.findOne(2L)); // Remove record from Person repository.delete(2L); // count records System.out.println("Count Person records: " + repository.count()); // find by name Person p = repository.findOne(new PersonSpecifications.NameEqualSpec("John")); System.out.println("Find by John is " + p); // find by age persons = repository.findAll(new PersonSpecifications.AgeBetweenSpec(20, 40)); System.out.println("Find Person with age between 20,40: "); for (Person person : persons) { System.out.println(person); } context.close(); } } java-design-patterns-1.9.0/repository/src/main/java/com/iluwatar/repository/Person.java000066400000000000000000000042761264154357600314060ustar00rootroot00000000000000package com.iluwatar.repository; import javax.persistence.Entity; import javax.persistence.GeneratedValue; import javax.persistence.Id; /** * * Person entity * */ @Entity public class Person { @Id @GeneratedValue private Long id; private String name; private String surname; private int age; public Person() { } /** * Constructor */ public Person(String name, String surname, int age) { this.name = name; this.surname = surname; this.age = age; } public Long getId() { return id; } public void setId(Long id) { this.id = id; } public String getName() { return name; } public void setName(String name) { this.name = name; } public String getSurname() { return surname; } public void setSurname(String surname) { this.surname = surname; } public int getAge() { return age; } public void setAge(int age) { this.age = age; } @Override public String toString() { return "Person [id=" + id + ", name=" + name + ", surname=" + surname + ", age=" + age + "]"; } @Override public int hashCode() { final int prime = 31; int result = 1; result = prime * result + age; result = prime * result + ((id == null) ? 0 : id.hashCode()); result = prime * result + ((name == null) ? 0 : name.hashCode()); result = prime * result + ((surname == null) ? 0 : surname.hashCode()); return result; } @Override public boolean equals(Object obj) { if (this == obj) { return true; } if (obj == null) { return false; } if (getClass() != obj.getClass()) { return false; } Person other = (Person) obj; if (age != other.age) { return false; } if (id == null) { if (other.id != null) { return false; } } else if (!id.equals(other.id)) { return false; } if (name == null) { if (other.name != null) { return false; } } else if (!name.equals(other.name)) { return false; } if (surname == null) { if (other.surname != null) { return false; } } else if (!surname.equals(other.surname)) { return false; } return true; } } java-design-patterns-1.9.0/repository/src/main/java/com/iluwatar/repository/PersonRepository.java000066400000000000000000000006351264154357600335010ustar00rootroot00000000000000package com.iluwatar.repository; import org.springframework.data.jpa.repository.JpaSpecificationExecutor; import org.springframework.data.repository.CrudRepository; import org.springframework.stereotype.Repository; /** * * Person repository * */ @Repository public interface PersonRepository extends CrudRepository, JpaSpecificationExecutor { Person findByName(String name); } PersonSpecifications.java000066400000000000000000000022751264154357600342100ustar00rootroot00000000000000java-design-patterns-1.9.0/repository/src/main/java/com/iluwatar/repositorypackage com.iluwatar.repository; import javax.persistence.criteria.CriteriaBuilder; import javax.persistence.criteria.CriteriaQuery; import javax.persistence.criteria.Predicate; import javax.persistence.criteria.Root; import org.springframework.data.jpa.domain.Specification; /** * Helper class, includes vary Specification as the abstraction of sql query criteria */ public class PersonSpecifications { public static class AgeBetweenSpec implements Specification { private int from; private int to; public AgeBetweenSpec(int from, int to) { this.from = from; this.to = to; } @Override public Predicate toPredicate(Root root, CriteriaQuery query, CriteriaBuilder cb) { return cb.between(root.get("age"), from, to); } } /** * Name specification * */ public static class NameEqualSpec implements Specification { public String name; public NameEqualSpec(String name) { this.name = name; } /** * Get predicate */ public Predicate toPredicate(Root root, CriteriaQuery query, CriteriaBuilder cb) { return cb.equal(root.get("name"), this.name); } } } java-design-patterns-1.9.0/repository/src/main/resources/000077500000000000000000000000001264154357600235305ustar00rootroot00000000000000java-design-patterns-1.9.0/repository/src/main/resources/META-INF/000077500000000000000000000000001264154357600246705ustar00rootroot00000000000000java-design-patterns-1.9.0/repository/src/main/resources/META-INF/persistence.xml000066400000000000000000000005321264154357600277360ustar00rootroot00000000000000 java-design-patterns-1.9.0/repository/src/main/resources/applicationContext.xml000066400000000000000000000035761264154357600301350ustar00rootroot00000000000000 java-design-patterns-1.9.0/repository/src/test/000077500000000000000000000000001264154357600215515ustar00rootroot00000000000000java-design-patterns-1.9.0/repository/src/test/java/000077500000000000000000000000001264154357600224725ustar00rootroot00000000000000java-design-patterns-1.9.0/repository/src/test/java/com/000077500000000000000000000000001264154357600232505ustar00rootroot00000000000000java-design-patterns-1.9.0/repository/src/test/java/com/iluwatar/000077500000000000000000000000001264154357600251005ustar00rootroot00000000000000java-design-patterns-1.9.0/repository/src/test/java/com/iluwatar/repository/000077500000000000000000000000001264154357600273175ustar00rootroot00000000000000AnnotationBasedRepositoryTest.java000066400000000000000000000053261264154357600361220ustar00rootroot00000000000000java-design-patterns-1.9.0/repository/src/test/java/com/iluwatar/repositorypackage com.iluwatar.repository; import static org.junit.Assert.assertEquals; import static org.junit.Assert.assertNull; import static org.junit.Assert.assertTrue; import java.util.Arrays; import java.util.List; import javax.annotation.Resource; import org.junit.After; import org.junit.Before; import org.junit.Test; import org.junit.runner.RunWith; import org.springframework.test.context.ContextConfiguration; import org.springframework.test.context.junit4.SpringJUnit4ClassRunner; import org.springframework.test.context.support.AnnotationConfigContextLoader; import com.google.common.collect.Lists; /** * Test case to test the functions of {@link PersonRepository}, beside the CRUD functions, the query * by {@link org.springframework.data.jpa.domain.Specification} are also test. * */ @RunWith(SpringJUnit4ClassRunner.class) @ContextConfiguration(classes = { AppConfig.class }, loader = AnnotationConfigContextLoader.class) public class AnnotationBasedRepositoryTest { @Resource private PersonRepository repository; Person peter = new Person("Peter", "Sagan", 17); Person nasta = new Person("Nasta", "Kuzminova", 25); Person john = new Person("John", "lawrence", 35); Person terry = new Person("Terry", "Law", 36); List persons = Arrays.asList(peter, nasta, john, terry); /** * Prepare data for test */ @Before public void setup() { repository.save(persons); } @Test public void testFindAll() { List actuals = Lists.newArrayList(repository.findAll()); assertTrue(actuals.containsAll(persons) && persons.containsAll(actuals)); } @Test public void testSave() { Person terry = repository.findByName("Terry"); terry.setSurname("Lee"); terry.setAge(47); repository.save(terry); terry = repository.findByName("Terry"); assertEquals(terry.getSurname(), "Lee"); assertEquals(47, terry.getAge()); } @Test public void testDelete() { Person terry = repository.findByName("Terry"); repository.delete(terry); assertEquals(3, repository.count()); assertNull(repository.findByName("Terry")); } @Test public void testCount() { assertEquals(4, repository.count()); } @Test public void testFindAllByAgeBetweenSpec() { List persons = repository.findAll(new PersonSpecifications.AgeBetweenSpec(20, 40)); assertEquals(3, persons.size()); assertTrue(persons.stream().allMatch((item) -> { return item.getAge() > 20 && item.getAge() < 40; })); } @Test public void testFindOneByNameEqualSpec() { Person actual = repository.findOne(new PersonSpecifications.NameEqualSpec("Terry")); assertEquals(terry, actual); } @After public void cleanup() { repository.deleteAll(); } } java-design-patterns-1.9.0/repository/src/test/java/com/iluwatar/repository/AppConfigTest.java000066400000000000000000000026021264154357600326700ustar00rootroot00000000000000package com.iluwatar.repository; import static org.junit.Assert.assertNotNull; import static org.junit.Assert.assertTrue; import java.sql.ResultSet; import java.sql.SQLException; import javax.sql.DataSource; import org.junit.Test; import org.junit.runner.RunWith; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.test.context.ContextConfiguration; import org.springframework.test.context.junit4.SpringJUnit4ClassRunner; import org.springframework.test.context.support.AnnotationConfigContextLoader; import org.springframework.transaction.annotation.Transactional; /** * This case is Just for test the Annotation Based configuration * */ @RunWith(SpringJUnit4ClassRunner.class) @ContextConfiguration(classes = { AppConfig.class }, loader = AnnotationConfigContextLoader.class) public class AppConfigTest { @Autowired DataSource dataSource; /** * Test for bean instance */ @Test public void testDataSource() { assertNotNull(dataSource); } /** * Test for correct query execution */ @Test @Transactional public void testQuery() throws SQLException { ResultSet resultSet = dataSource.getConnection().createStatement().executeQuery("SELECT 1"); String result = null; String expected = "1"; while (resultSet.next()) { result = resultSet.getString(1); } assertTrue(result.equals(expected)); } } java-design-patterns-1.9.0/repository/src/test/java/com/iluwatar/repository/RepositoryTest.java000066400000000000000000000051331264154357600332030ustar00rootroot00000000000000package com.iluwatar.repository; import static org.junit.Assert.assertEquals; import static org.junit.Assert.assertNull; import static org.junit.Assert.assertTrue; import java.util.Arrays; import java.util.List; import javax.annotation.Resource; import org.junit.After; import org.junit.Before; import org.junit.Test; import org.junit.runner.RunWith; import org.springframework.test.context.ContextConfiguration; import org.springframework.test.context.junit4.SpringJUnit4ClassRunner; import com.google.common.collect.Lists; /** * Test case to test the functions of {@link PersonRepository}, beside the CRUD functions, the query * by {@link org.springframework.data.jpa.domain.Specification} are also test. */ @RunWith(SpringJUnit4ClassRunner.class) @ContextConfiguration(locations = { "classpath:applicationContext.xml" }) public class RepositoryTest { @Resource private PersonRepository repository; Person peter = new Person("Peter", "Sagan", 17); Person nasta = new Person("Nasta", "Kuzminova", 25); Person john = new Person("John", "lawrence", 35); Person terry = new Person("Terry", "Law", 36); List persons = Arrays.asList(peter, nasta, john, terry); /** * Prepare data for test */ @Before public void setup() { repository.save(persons); } @Test public void testFindAll() { List actuals = Lists.newArrayList(repository.findAll()); assertTrue(actuals.containsAll(persons) && persons.containsAll(actuals)); } @Test public void testSave() { Person terry = repository.findByName("Terry"); terry.setSurname("Lee"); terry.setAge(47); repository.save(terry); terry = repository.findByName("Terry"); assertEquals(terry.getSurname(), "Lee"); assertEquals(47, terry.getAge()); } @Test public void testDelete() { Person terry = repository.findByName("Terry"); repository.delete(terry); assertEquals(3, repository.count()); assertNull(repository.findByName("Terry")); } @Test public void testCount() { assertEquals(4, repository.count()); } @Test public void testFindAllByAgeBetweenSpec() { List persons = repository.findAll(new PersonSpecifications.AgeBetweenSpec(20, 40)); assertEquals(3, persons.size()); assertTrue(persons.stream().allMatch((item) -> { return item.getAge() > 20 && item.getAge() < 40; })); } @Test public void testFindOneByNameEqualSpec() { Person actual = repository.findOne(new PersonSpecifications.NameEqualSpec("Terry")); assertEquals(terry, actual); } @After public void cleanup() { repository.deleteAll(); } } java-design-patterns-1.9.0/resource-acquisition-is-initialization/000077500000000000000000000000001264154357600253775ustar00rootroot00000000000000java-design-patterns-1.9.0/resource-acquisition-is-initialization/etc/000077500000000000000000000000001264154357600261525ustar00rootroot00000000000000resource-acquisition-is-initialization.png000066400000000000000000000072601264154357600364210ustar00rootroot00000000000000java-design-patterns-1.9.0/resource-acquisition-is-initialization/etcPNG  IHDRpCX"wIDATx]ݏ7 X)7҈@WiSMU%4tS Uq%)%! &qm.!DQ#6MiSJS>A[$Jx;Ǟ;c=OWs=3g{<>h NCt(P@@q(Df# FAS?`b;DLA3w#SSS…ZiE=ifj!I(7 .v[}15EUAcstڑXw݅%9OrJTGIQM9h9Ke ȅWWs!1dL{ ҅TUTDn9NE^,ʄ`FLvLl|~U!#]U.$EU0x'*"ט\wR2~@ZXRٰVw=h"RbYJ0~ȵ!׫};Z-;]>FIO$^Cak4s# :Ӄ^{Ku-8Ed4G6$2/k8@#UAE"DÇߢ"rMiJ!lQl<*\<*\<*\<*\<*\<*\؉ky S_ǶmxFد]ο?>{G ڹX<dM ?{4ɔ&*cSڅdYh: 3D%ϓ/ztb{g}ٷ>]s8o^0 -(JT6TWވjwX+jgv_y@s3Rԝ#'3hHVTsnpa21[ ˓3Be?H0#'wl;﮽r?^:x3 dGҽgySѿVE'byylVq=Y$)d_2%;,.;0#9B)5!]Me*[7u{냏nMn3Ǝ1wc) W xjs]][G(NJ$╨* {j`jA*Q/MA%sԬSBn* Q}sG몷oX_ v?a*.v%\TFUaW%Y߻nqOǴIW )dmKr_,p@VR7FbWnؽp\wx gn,}SbR:r2B}Ɣav]Ӗ PiH}Uu"r݊'}c<uK%N}hv]#Q[o?{oख़/~rM'lm{(*kŎ.4Qݿb!Hk@Q1̾zl:=?peO l) {MhxGUuA>ŠxOU&68ˁ {5 N*P C>c-,9*]{'6ui˶YZQF nƜoH{,}+vmDTH >mwįM=l1LVGYʙ9 OTD.]-fdqem4,p@,;$)*"Wnt[dL+*-IvʅD{ EEJL^jwpL >;}Q,%Q`MĹw#SSSS.U(4Mw wRyZ`QOSS.*zTm<@E* #p6jOQ&խٞDWS'-tSf%%9NT;_v}g> E,ʐݯq5:od,DO_S, dRe1'# *c;ŪP],dQeST-z(X"E$NTך</4u@)tҦ_"*tz9eb5Ee.*HAxO)ʣ2_<ЖG;Q}_ޱܮϰ_E *UˎJvL#IwDeh^|LPJ?UHv<G;QM/XwCo0{,Xw|EڋJa=6_\3]**tVhdz,?\TF#tZTa [* vbz's򡹿mQanC21hZdW-KڳcEX"h~=#Le>0lnvT2/&TpHͳ>dPm(Ӊ:vưpnRS0)$?iuÑ3d|LW4\ޝH<hlcQ4T>aW[D+hFEЎy#=9cUeּW<<*\<*\<*\<*\<*\%Y?6pZ䋓HjܼRL"]rWn0T%@;䮲/jD~SwUd\^3Ss k'ge.}ďyuW?}ܹ}3%Ni> W<=VQYWA;6" 15bVQ~ZU[3^{ARKe}ܹzՂ+WdO:OzRb!w<ݏpnK&_io3+OR!15b!waLS ୨}+0ߩ{U(*7D.Aj%D.HTD.HTD.pQZuGD(hBPľkj@aTǁDE>8}IENDB`resource-acquisition-is-initialization.ucls000066400000000000000000000041701264154357600366000ustar00rootroot00000000000000java-design-patterns-1.9.0/resource-acquisition-is-initialization/etc java-design-patterns-1.9.0/resource-acquisition-is-initialization/index.md000066400000000000000000000011401264154357600270240ustar00rootroot00000000000000--- layout: pattern title: Resource Acquisition Is Initialization folder: resource-acquisition-is-initialization permalink: /patterns/resource-acquisition-is-initialization/ categories: Other tags: - Java - Difficulty-Beginner - Idiom --- **Intent:** Resource Acquisition Is Initialization pattern can be used to implement exception safe resource management. ![alt text](./etc/resource-acquisition-is-initialization.png "Resource Acquisition Is Initialization") **Applicability:** Use the Resource Acquisition Is Initialization pattern when * you have resources that must be closed in every condition java-design-patterns-1.9.0/resource-acquisition-is-initialization/pom.xml000066400000000000000000000014251264154357600267160ustar00rootroot00000000000000 4.0.0 com.iluwatar java-design-patterns 1.9.0 resource-acquisition-is-initialization junit junit test org.mockito mockito-core test java-design-patterns-1.9.0/resource-acquisition-is-initialization/src/000077500000000000000000000000001264154357600261665ustar00rootroot00000000000000java-design-patterns-1.9.0/resource-acquisition-is-initialization/src/main/000077500000000000000000000000001264154357600271125ustar00rootroot00000000000000java-design-patterns-1.9.0/resource-acquisition-is-initialization/src/main/java/000077500000000000000000000000001264154357600300335ustar00rootroot00000000000000java-design-patterns-1.9.0/resource-acquisition-is-initialization/src/main/java/com/000077500000000000000000000000001264154357600306115ustar00rootroot00000000000000java-design-patterns-1.9.0/resource-acquisition-is-initialization/src/main/java/com/iluwatar/000077500000000000000000000000001264154357600324415ustar00rootroot00000000000000resource/000077500000000000000000000000001264154357600342115ustar00rootroot00000000000000java-design-patterns-1.9.0/resource-acquisition-is-initialization/src/main/java/com/iluwataracquisition/000077500000000000000000000000001264154357600365415ustar00rootroot00000000000000java-design-patterns-1.9.0/resource-acquisition-is-initialization/src/main/java/com/iluwatar/resourceis/000077500000000000000000000000001264154357600371545ustar00rootroot00000000000000java-design-patterns-1.9.0/resource-acquisition-is-initialization/src/main/java/com/iluwatar/resource/acquisitioninitialization/000077500000000000000000000000001264154357600422035ustar00rootroot00000000000000java-design-patterns-1.9.0/resource-acquisition-is-initialization/src/main/java/com/iluwatar/resource/acquisition/isApp.java000066400000000000000000000026431264154357600435730ustar00rootroot00000000000000java-design-patterns-1.9.0/resource-acquisition-is-initialization/src/main/java/com/iluwatar/resource/acquisition/is/initializationpackage com.iluwatar.resource.acquisition.is.initialization; /** * * Resource Acquisition Is Initialization pattern was developed for exception safe resource * management by C++ creator Bjarne Stroustrup. *

* In RAII resource is tied to object lifetime: resource allocation is done during object creation * while resource deallocation is done during object destruction. *

* In Java RAII is achieved with try-with-resources statement and interfaces {@link Closeable} and * {@link AutoCloseable}. The try-with-resources statement ensures that each resource is closed at * the end of the statement. Any object that implements {@link java.lang.AutoCloseable}, which * includes all objects which implement {@link java.io.Closeable}, can be used as a resource. * * In this example, {@link SlidingDoor} implements {@link AutoCloseable} and {@link TreasureChest} * implements {@link Closeable}. Running the example, we can observe that both resources are * automatically closed. *

* http://docs.oracle.com/javase/7/docs/technotes/guides/language/try-with-resources.html * */ public class App { /** * Program entry point */ public static void main(String[] args) throws Exception { try (SlidingDoor slidingDoor = new SlidingDoor()) { System.out.println("Walking in."); } try (TreasureChest treasureChest = new TreasureChest()) { System.out.println("Looting contents."); } } } SlidingDoor.java000066400000000000000000000005221264154357600452620ustar00rootroot00000000000000java-design-patterns-1.9.0/resource-acquisition-is-initialization/src/main/java/com/iluwatar/resource/acquisition/is/initializationpackage com.iluwatar.resource.acquisition.is.initialization; /** * * SlidingDoor resource * */ public class SlidingDoor implements AutoCloseable { public SlidingDoor() { System.out.println("Sliding door opens."); } @Override public void close() throws Exception { System.out.println("Sliding door closes."); } } TreasureChest.java000066400000000000000000000006211264154357600456260ustar00rootroot00000000000000java-design-patterns-1.9.0/resource-acquisition-is-initialization/src/main/java/com/iluwatar/resource/acquisition/is/initializationpackage com.iluwatar.resource.acquisition.is.initialization; import java.io.Closeable; import java.io.IOException; /** * * TreasureChest resource * */ public class TreasureChest implements Closeable { public TreasureChest() { System.out.println("Treasure chest opens."); } @Override public void close() throws IOException { System.out.println("Treasure chest closes."); } } java-design-patterns-1.9.0/resource-acquisition-is-initialization/src/test/000077500000000000000000000000001264154357600271455ustar00rootroot00000000000000java-design-patterns-1.9.0/resource-acquisition-is-initialization/src/test/java/000077500000000000000000000000001264154357600300665ustar00rootroot00000000000000java-design-patterns-1.9.0/resource-acquisition-is-initialization/src/test/java/com/000077500000000000000000000000001264154357600306445ustar00rootroot00000000000000java-design-patterns-1.9.0/resource-acquisition-is-initialization/src/test/java/com/iluwatar/000077500000000000000000000000001264154357600324745ustar00rootroot00000000000000resource/000077500000000000000000000000001264154357600342445ustar00rootroot00000000000000java-design-patterns-1.9.0/resource-acquisition-is-initialization/src/test/java/com/iluwataracquisition/000077500000000000000000000000001264154357600365745ustar00rootroot00000000000000java-design-patterns-1.9.0/resource-acquisition-is-initialization/src/test/java/com/iluwatar/resourceis/000077500000000000000000000000001264154357600372075ustar00rootroot00000000000000java-design-patterns-1.9.0/resource-acquisition-is-initialization/src/test/java/com/iluwatar/resource/acquisitioninitialization/000077500000000000000000000000001264154357600422365ustar00rootroot00000000000000java-design-patterns-1.9.0/resource-acquisition-is-initialization/src/test/java/com/iluwatar/resource/acquisition/isAppTest.java000066400000000000000000000003631264154357600444630ustar00rootroot00000000000000java-design-patterns-1.9.0/resource-acquisition-is-initialization/src/test/java/com/iluwatar/resource/acquisition/is/initializationpackage com.iluwatar.resource.acquisition.is.initialization; import org.junit.Test; /** * * Application test * */ public class AppTest { @Test public void test() throws Exception { String[] args = {}; App.main(args); } } ClosableTest.java000066400000000000000000000014711264154357600454700ustar00rootroot00000000000000java-design-patterns-1.9.0/resource-acquisition-is-initialization/src/test/java/com/iluwatar/resource/acquisition/is/initializationpackage com.iluwatar.resource.acquisition.is.initialization; import org.junit.Test; import org.mockito.InOrder; import static org.mockito.Mockito.inOrder; /** * Date: 12/28/15 - 9:31 PM * * @author Jeroen Meulemeester */ public class ClosableTest extends StdOutTest { @Test public void testOpenClose() throws Exception { final InOrder inOrder = inOrder(getStdOutMock()); try (final SlidingDoor door = new SlidingDoor(); final TreasureChest chest = new TreasureChest()) { inOrder.verify(getStdOutMock()).println("Sliding door opens."); inOrder.verify(getStdOutMock()).println("Treasure chest opens."); } inOrder.verify(getStdOutMock()).println("Treasure chest closes."); inOrder.verify(getStdOutMock()).println("Sliding door closes."); inOrder.verifyNoMoreInteractions(); } }StdOutTest.java000066400000000000000000000023461264154357600451700ustar00rootroot00000000000000java-design-patterns-1.9.0/resource-acquisition-is-initialization/src/test/java/com/iluwatar/resource/acquisition/is/initializationpackage com.iluwatar.resource.acquisition.is.initialization; import org.junit.After; import org.junit.Before; import java.io.PrintStream; import static org.mockito.Mockito.mock; /** * Date: 12/10/15 - 8:37 PM * * @author Jeroen Meulemeester */ public abstract class StdOutTest { /** * The mocked standard out {@link PrintStream}, required since some actions don't have any * influence on accessible objects, except for writing to std-out using {@link System#out} */ private final PrintStream stdOutMock = mock(PrintStream.class); /** * Keep the original std-out so it can be restored after the test */ private final PrintStream stdOutOrig = System.out; /** * Inject the mocked std-out {@link PrintStream} into the {@link System} class before each test */ @Before public void setUp() { System.setOut(this.stdOutMock); 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Instead of defining that behavior in each class - or when we cannot factor out this behavior in the common parent class - it is defined once in the Servant. ![alt text](./etc/servant-pattern.png "Servant") **Applicability:** Use the Servant pattern when * when we want some objects to perform a common action and don't want to define this action as a method in every class. java-design-patterns-1.9.0/servant/pom.xml000066400000000000000000000013661264154357600205710ustar00rootroot00000000000000 4.0.0 com.iluwatar java-design-patterns 1.9.0 servant junit junit test org.mockito mockito-core test java-design-patterns-1.9.0/servant/src/000077500000000000000000000000001264154357600200355ustar00rootroot00000000000000java-design-patterns-1.9.0/servant/src/etc/000077500000000000000000000000001264154357600206105ustar00rootroot00000000000000java-design-patterns-1.9.0/servant/src/etc/servant.jpg000066400000000000000000004074551264154357600230130ustar00rootroot00000000000000JFIF``AdobeeCC" }!1AQa"q2#BR$3br %&'()*456789:CDEFGHIJSTUVWXYZcdefghijstuvwxyz w!1AQaq"2B #3Rbr $4%&'()*56789:CDEFGHIJSTUVWXYZcdefghijstuvwxyz ?(((((((((((((((((((((mwg#iiw^ ~/[~=z\$Msgqr2E?Qg??_ax^[}s?0t/G<z(_\?yQg??z(޾ ?~G"`޾ 7€9oE(3E:w[}s?0t/G<z(_\?yQg??z(޾ ?~G"`޾ 7€9oE(3E:؇ u{xsĚ/ᖋ|I 15:FYwKg𔷲^%i}3>#9} i~oC<,0qTөGRTh{7 jԂ)b$T暥]dO7˩Jkb=jSF%S8G M֧[\EV}s?0t/G<~W=/k /5( O~;W~"CZ]:>zR+Zn)w~M>9?eOZ/|Ln> ែ> x? 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XMV| <1oR>0пo[/ʚ ,<_BiҾ ʿ~$x⏎#g }Cښ|7 {[xjVV ?Go :o>_şڷw?O_q.$&_EuKZv?bQ@կռ'Vi*CQ:O5^|g~xD_tt??ƖQx^<|O8._O~ <9H|0xwE/+ߵ?Km5?Ěំ^?hG_&7L>>x?03o2K o x/u Zv~#xP{xoh$ð[kgb:g-_j~j]6Gᯍ է|u|`5FiE;?j Me>~~eo#z)x G<q|!Z8s4&?~ O=j_  xż ^$n/RA^Cc]k$c-m{goEQEQEQEQEQEQEQEQEQEQEQEQEQEQEQEQEQEQEQEQEQEQEQEQEQEQEQEQEQEQEQEQEQEQEQEQEQEQEQEQEQEQEQEQEQEQEQEQEQEQEQEQEjava-design-patterns-1.9.0/servant/src/etc/servant.svg000066400000000000000000001565501264154357600230270ustar00rootroot00000000000000 UML diagram java-design-patterns App (from iluwatar) main(String[*]): void scenario(Servant[0..1], Integer): void King (from iluwatar) isHappy: Boolean complimentReceived: Boolean getFed(): void getDrink(): void receiveCompliments(): void changeMood(): void getMood(): Boolean Queen (from iluwatar) isHappy: Boolean complimentReceived: Boolean getFed(): void getDrink(): void receiveCompliments(): void changeMood(): void getMood(): Boolean setFlirtiness(Boolean): void « Interface » Royalty (from iluwatar) getFed(): void getDrink(): void changeMood(): void receiveCompliments(): void getMood(): Boolean Servant (from iluwatar) name: String[0..1] Servant(String[0..1]): void feed(Royalty[0..1]): void giveWine(Royalty[0..1]): void GiveCompliments(Royalty[0..1]): void checkIfYouWillBeHanged(Royalty[*]): Boolean 1..* « use » java-design-patterns-1.9.0/servant/src/etc/servant.xml000066400000000000000000001242251264154357600230220ustar00rootroot00000000000000

java-design-patterns-1.9.0/servant/src/main/000077500000000000000000000000001264154357600207615ustar00rootroot00000000000000java-design-patterns-1.9.0/servant/src/main/java/000077500000000000000000000000001264154357600217025ustar00rootroot00000000000000java-design-patterns-1.9.0/servant/src/main/java/com/000077500000000000000000000000001264154357600224605ustar00rootroot00000000000000java-design-patterns-1.9.0/servant/src/main/java/com/iluwatar/000077500000000000000000000000001264154357600243105ustar00rootroot00000000000000java-design-patterns-1.9.0/servant/src/main/java/com/iluwatar/servant/000077500000000000000000000000001264154357600257725ustar00rootroot00000000000000java-design-patterns-1.9.0/servant/src/main/java/com/iluwatar/servant/App.java000066400000000000000000000027431264154357600273630ustar00rootroot00000000000000package com.iluwatar.servant; import java.util.ArrayList; /** * Servant offers some functionality to a group of classes without defining that functionality in * each of them. A Servant is a class whose instance provides methods that take care of a desired * service, while objects for which the servant does something, are taken as parameters. *

* In this example {@link Servant} is serving {@link King} and {@link Queen}. * */ public class App { static Servant jenkins = new Servant("Jenkins"); static Servant travis = new Servant("Travis"); /** * Program entry point */ public static void main(String[] args) { scenario(jenkins, 1); scenario(travis, 0); } /** * Can add a List with enum Actions for variable scenarios */ public static void scenario(Servant servant, int compliment) { King k = new King(); Queen q = new Queen(); ArrayList guests = new ArrayList<>(); guests.add(k); guests.add(q); // feed servant.feed(k); servant.feed(q); // serve drinks servant.giveWine(k); servant.giveWine(q); // compliment servant.giveCompliments(guests.get(compliment)); // outcome of the night for (Royalty r : guests) { r.changeMood(); } // check your luck if (servant.checkIfYouWillBeHanged(guests)) { System.out.println(servant.name + " will live another day"); } else { System.out.println("Poor " + servant.name + ". His days are numbered"); } } } java-design-patterns-1.9.0/servant/src/main/java/com/iluwatar/servant/King.java000066400000000000000000000012171264154357600275260ustar00rootroot00000000000000package com.iluwatar.servant; /** * * King * */ public class King implements Royalty { private boolean isDrunk; private boolean isHungry = true; private boolean isHappy; private boolean complimentReceived; @Override public void getFed() { isHungry = false; } @Override public void getDrink() { isDrunk = true; } public void receiveCompliments() { complimentReceived = true; } @Override public void changeMood() { if (!isHungry && isDrunk) { isHappy = true; } if (complimentReceived) { isHappy = false; } } @Override public boolean getMood() { return isHappy; } } java-design-patterns-1.9.0/servant/src/main/java/com/iluwatar/servant/Queen.java000066400000000000000000000013411264154357600277110ustar00rootroot00000000000000package com.iluwatar.servant; /** * * Queen * */ public class Queen implements Royalty { private boolean isDrunk = true; private boolean isHungry; private boolean isHappy; private boolean isFlirty = true; private boolean complimentReceived; @Override public void getFed() { isHungry = false; } @Override public void getDrink() { isDrunk = true; } public void receiveCompliments() { complimentReceived = true; } @Override public void changeMood() { if (complimentReceived && isFlirty && isDrunk && !isHungry) { isHappy = true; } } @Override public boolean getMood() { return isHappy; } public void setFlirtiness(boolean f) { this.isFlirty = f; } } java-design-patterns-1.9.0/servant/src/main/java/com/iluwatar/servant/Royalty.java000066400000000000000000000002771264154357600303060ustar00rootroot00000000000000package com.iluwatar.servant; /** * * Royalty * */ interface Royalty { void getFed(); void getDrink(); void changeMood(); void receiveCompliments(); boolean getMood(); } java-design-patterns-1.9.0/servant/src/main/java/com/iluwatar/servant/Servant.java000066400000000000000000000012641264154357600302620ustar00rootroot00000000000000package com.iluwatar.servant; import java.util.ArrayList; /** * * Servant * */ public class Servant { public String name; /** * Constructor */ public Servant(String name) { this.name = name; } public void feed(Royalty r) { r.getFed(); } public void giveWine(Royalty r) { r.getDrink(); } public void giveCompliments(Royalty r) { r.receiveCompliments(); } /** * Check if we will be hanged */ public boolean checkIfYouWillBeHanged(ArrayList tableGuests) { boolean anotherDay = true; for (Royalty r : tableGuests) { if (!r.getMood()) { anotherDay = false; } } return anotherDay; } } java-design-patterns-1.9.0/servant/src/test/000077500000000000000000000000001264154357600210145ustar00rootroot00000000000000java-design-patterns-1.9.0/servant/src/test/java/000077500000000000000000000000001264154357600217355ustar00rootroot00000000000000java-design-patterns-1.9.0/servant/src/test/java/com/000077500000000000000000000000001264154357600225135ustar00rootroot00000000000000java-design-patterns-1.9.0/servant/src/test/java/com/iluwatar/000077500000000000000000000000001264154357600243435ustar00rootroot00000000000000java-design-patterns-1.9.0/servant/src/test/java/com/iluwatar/servant/000077500000000000000000000000001264154357600260255ustar00rootroot00000000000000java-design-patterns-1.9.0/servant/src/test/java/com/iluwatar/servant/AppTest.java000066400000000000000000000003031264154357600302440ustar00rootroot00000000000000package com.iluwatar.servant; import org.junit.Test; /** * * Application test * */ public class AppTest { @Test public void test() { String[] args = {}; App.main(args); } } java-design-patterns-1.9.0/servant/src/test/java/com/iluwatar/servant/KingTest.java000066400000000000000000000032311264154357600304170ustar00rootroot00000000000000package com.iluwatar.servant; import org.junit.Test; import static org.junit.Assert.*; /** * Date: 12/28/15 - 9:40 PM * * @author Jeroen Meulemeester */ public class KingTest { @Test public void testHungrySoberUncomplimentedKing() { final King king = new King(); king.changeMood(); assertFalse(king.getMood()); } @Test public void testFedSoberUncomplimentedKing() { final King king = new King(); king.getFed(); king.changeMood(); assertFalse(king.getMood()); } @Test public void testHungryDrunkUncomplimentedKing() { final King king = new King(); king.getDrink(); king.changeMood(); assertFalse(king.getMood()); } @Test public void testHungrySoberComplimentedKing() { final King king = new King(); king.receiveCompliments(); king.changeMood(); assertFalse(king.getMood()); } @Test public void testFedDrunkUncomplimentedKing() { final King king = new King(); king.getFed(); king.getDrink(); king.changeMood(); assertTrue(king.getMood()); } @Test public void testFedSoberComplimentedKing() { final King king = new King(); king.getFed(); king.receiveCompliments(); king.changeMood(); assertFalse(king.getMood()); } @Test public void testFedDrunkComplimentedKing() { final King king = new King(); king.getFed(); king.getDrink(); king.receiveCompliments(); king.changeMood(); assertFalse(king.getMood()); } @Test public void testHungryDrunkComplimentedKing() { final King king = new King(); king.getDrink(); king.receiveCompliments(); king.changeMood(); assertFalse(king.getMood()); } }java-design-patterns-1.9.0/servant/src/test/java/com/iluwatar/servant/QueenTest.java000066400000000000000000000017441264154357600306130ustar00rootroot00000000000000package com.iluwatar.servant; import org.junit.Test; import static org.junit.Assert.*; /** * Date: 12/28/15 - 9:52 PM * * @author Jeroen Meulemeester */ public class QueenTest { @Test public void testNotFlirtyUncomplemented() throws Exception { final Queen queen = new Queen(); queen.setFlirtiness(false); queen.changeMood(); assertFalse(queen.getMood()); } @Test public void testNotFlirtyComplemented() throws Exception { final Queen queen = new Queen(); queen.setFlirtiness(false); queen.receiveCompliments(); queen.changeMood(); assertFalse(queen.getMood()); } @Test public void testFlirtyUncomplemented() throws Exception { final Queen queen = new Queen(); queen.changeMood(); assertFalse(queen.getMood()); } @Test public void testFlirtyComplemented() throws Exception { final Queen queen = new Queen(); queen.receiveCompliments(); queen.changeMood(); assertTrue(queen.getMood()); } }java-design-patterns-1.9.0/servant/src/test/java/com/iluwatar/servant/ServantTest.java000066400000000000000000000037111264154357600311540ustar00rootroot00000000000000package com.iluwatar.servant; import org.junit.Test; import java.util.ArrayList; import static org.junit.Assert.*; import static org.mockito.Mockito.mock; import static org.mockito.Mockito.verify; import static org.mockito.Mockito.verifyNoMoreInteractions; import static org.mockito.Mockito.when; /** * Date: 12/28/15 - 10:02 PM * * @author Jeroen Meulemeester */ public class ServantTest { @Test public void testFeed() throws Exception { final Royalty royalty = mock(Royalty.class); final Servant servant = new Servant("test"); servant.feed(royalty); verify(royalty).getFed(); verifyNoMoreInteractions(royalty); } @Test public void testGiveWine() throws Exception { final Royalty royalty = mock(Royalty.class); final Servant servant = new Servant("test"); servant.giveWine(royalty); verify(royalty).getDrink(); verifyNoMoreInteractions(royalty); } @Test public void testGiveCompliments() throws Exception { final Royalty royalty = mock(Royalty.class); final Servant servant = new Servant("test"); servant.giveCompliments(royalty); verify(royalty).receiveCompliments(); verifyNoMoreInteractions(royalty); } @Test public void testCheckIfYouWillBeHanged() throws Exception { final Royalty goodMoodRoyalty = mock(Royalty.class); when(goodMoodRoyalty.getMood()).thenReturn(true); final Royalty badMoodRoyalty = mock(Royalty.class); when(badMoodRoyalty.getMood()).thenReturn(true); final ArrayList goodCompany = new ArrayList<>(); goodCompany.add(goodMoodRoyalty); goodCompany.add(goodMoodRoyalty); goodCompany.add(goodMoodRoyalty); final ArrayList badCompany = new ArrayList<>(); goodCompany.add(goodMoodRoyalty); goodCompany.add(goodMoodRoyalty); goodCompany.add(badMoodRoyalty); assertTrue(new Servant("test").checkIfYouWillBeHanged(goodCompany)); assertTrue(new Servant("test").checkIfYouWillBeHanged(badCompany)); } }java-design-patterns-1.9.0/service-layer/000077500000000000000000000000001264154357600203365ustar00rootroot00000000000000java-design-patterns-1.9.0/service-layer/bin/000077500000000000000000000000001264154357600211065ustar00rootroot00000000000000java-design-patterns-1.9.0/service-layer/bin/pom.xml000066400000000000000000000014741264154357600224310ustar00rootroot00000000000000 4.0.0 com.iluwatar java-design-patterns 1.0-SNAPSHOT dao org.hibernate hibernate-core com.h2database h2 junit junit test java-design-patterns-1.9.0/service-layer/etc/000077500000000000000000000000001264154357600211115ustar00rootroot00000000000000java-design-patterns-1.9.0/service-layer/etc/service-layer.png000066400000000000000000002575561264154357600244150ustar00rootroot00000000000000PNG  IHDRq_5IDATxo3]{KUHPiK0KpRrx\1:rcræ&nI:Nٴ8!OJCKP`sRiS5u HZos{ete=5k{A79@- NTC4O7vP 1M0 zD` 1DL}h08Q!@ >A79@-N.NۜpGp~}A79@-v و"j CK`7vPKq?YayJ¹+͋v$+՗3L BA79@- Nу_e?)`6Cq >;Z\h)Ny-g XJAtf)7vPˆigu:Xlq'^MwNx}#F\. y.g XB z zA79@- N.Yz ~E1@7ۮ?p݈:K^[Xq9c'A@osZ$?мxxngw0Xr$&(͇ o1A@osZ^O^<}ݩ\ivA: {gKhɘĺvC :@9@-A Nw8/82 zbLn(>kK78_>]b>|u#1B_ 4}h18?F@CCybu6ny|FV!cnAW(F;%z1M0 zD` 1DL}h08Q!@ >A79@- NTC4O7vP 1M0 zD` 1J|o숵@osZ m_z|- w<~x-v/|_eſoՃ@osZ8$bu1P|T4?xo!^_&20A79@-N\$ozXn_powЫvW"qd;~1`r?}o;/~Oſ~#?xѼunL$*'ik;U:v;A79@-[N$?k&{+gVA1Z !H~w[_ՅaĸF^i^l^ mA8ʏ Gl{lG^vM'}hl38<7_pN˅F $d k-|/ol}/<7>96xyiBLM-ryn]469fuà;3 zԲgLwËڳgo ̎s"moq5!eL;v:XB2l1\a 1H~=o;/~Zlo'c=Ng9mg =]|fwqڦWoݗ}dlǍu- ǚff#?keN¯ zԲkLTϼ[u\.{|s>޼ǾCw\=?xԙ {Cm ix;3q[wuoOoGxӵpG/ѵٮyL>6˽q n|viuM-˗>αfs  ZԒbpnhdC G8֯Wچ.\Cdݦ-'ねbh&،]QѷVo|毾o݅nM45kvm]|i26mn ll釶Lta/9o;H~jfpiz"cƻ\_l; 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C`KڒUB%`~I|P /iݕ|!0%mo`0\A. 8;گiIENDB`java-design-patterns-1.9.0/service-layer/etc/service-layer.ucls000066400000000000000000000341531264154357600245610ustar00rootroot00000000000000 java-design-patterns-1.9.0/service-layer/index.md000066400000000000000000000021001264154357600217600ustar00rootroot00000000000000--- layout: pattern title: Service Layer folder: service-layer permalink: /patterns/service-layer/ categories: Architectural tags: - Java - Difficulty-Intermediate --- **Intent:** Service Layer is an abstraction over domain logic. Typically applications require multiple kinds of interfaces to the data they store and logic they implement: data loaders, user interfaces, integration gateways, and others. Despite their different purposes, these interfaces often need common interactions with the application to access and manipulate its data and invoke its business logic. The Service Layer fulfills this role. ![alt text](./etc/service-layer.png "Service Layer") **Applicability:** Use the Service Layer pattern when * you want to encapsulate domain logic under API * you need to implement multiple interfaces with common logic and data **Credits:** * [Martin Fowler - Service Layer](http://martinfowler.com/eaaCatalog/serviceLayer.html) * [Patterns of Enterprise Application Architecture](http://www.amazon.com/Patterns-Enterprise-Application-Architecture-Martin/dp/0321127420) java-design-patterns-1.9.0/service-layer/pom.xml000066400000000000000000000017151264154357600216570ustar00rootroot00000000000000 4.0.0 com.iluwatar java-design-patterns 1.9.0 service-layer org.hibernate hibernate-core com.h2database h2 junit junit test org.mockito mockito-core test java-design-patterns-1.9.0/service-layer/src/000077500000000000000000000000001264154357600211255ustar00rootroot00000000000000java-design-patterns-1.9.0/service-layer/src/main/000077500000000000000000000000001264154357600220515ustar00rootroot00000000000000java-design-patterns-1.9.0/service-layer/src/main/java/000077500000000000000000000000001264154357600227725ustar00rootroot00000000000000java-design-patterns-1.9.0/service-layer/src/main/java/com/000077500000000000000000000000001264154357600235505ustar00rootroot00000000000000java-design-patterns-1.9.0/service-layer/src/main/java/com/iluwatar/000077500000000000000000000000001264154357600254005ustar00rootroot00000000000000java-design-patterns-1.9.0/service-layer/src/main/java/com/iluwatar/servicelayer/000077500000000000000000000000001264154357600300755ustar00rootroot00000000000000java-design-patterns-1.9.0/service-layer/src/main/java/com/iluwatar/servicelayer/app/000077500000000000000000000000001264154357600306555ustar00rootroot00000000000000java-design-patterns-1.9.0/service-layer/src/main/java/com/iluwatar/servicelayer/app/App.java000066400000000000000000000160571264154357600322510ustar00rootroot00000000000000package com.iluwatar.servicelayer.app; import java.util.List; import com.iluwatar.servicelayer.magic.MagicService; import com.iluwatar.servicelayer.magic.MagicServiceImpl; import com.iluwatar.servicelayer.spell.Spell; import com.iluwatar.servicelayer.spell.SpellDao; import com.iluwatar.servicelayer.spell.SpellDaoImpl; import com.iluwatar.servicelayer.spellbook.Spellbook; import com.iluwatar.servicelayer.spellbook.SpellbookDao; import com.iluwatar.servicelayer.spellbook.SpellbookDaoImpl; import com.iluwatar.servicelayer.wizard.Wizard; import com.iluwatar.servicelayer.wizard.WizardDao; import com.iluwatar.servicelayer.wizard.WizardDaoImpl; /** * Service layer defines an application's boundary with a layer of services that establishes a set * of available operations and coordinates the application's response in each operation. *

* Enterprise applications typically require different kinds of interfaces to the data they store * and the logic they implement: data loaders, user interfaces, integration gateways, and others. * Despite their different purposes, these interfaces often need common interactions with the * application to access and manipulate its data and invoke its business logic. The interactions may * be complex, involving transactions across multiple resources and the coordination of several * responses to an action. Encoding the logic of the interactions separately in each interface * causes a lot of duplication. *

* The example application demonstrates interactions between a client ({@link App}) and a service ( * {@link MagicService}). The service is implemented with 3-layer architecture (entity, dao, * service). For persistence the example uses in-memory H2 database which is populated on each * application startup. * */ public class App { /** * Program entry point * * @param args command line args */ public static void main(String[] args) { // populate the in-memory database initData(); // query the data using the service queryData(); } /** * Initialize data */ public static void initData() { // spells Spell spell1 = new Spell("Ice dart"); Spell spell2 = new Spell("Invisibility"); Spell spell3 = new Spell("Stun bolt"); Spell spell4 = new Spell("Confusion"); Spell spell5 = new Spell("Darkness"); Spell spell6 = new Spell("Fireball"); Spell spell7 = new Spell("Enchant weapon"); Spell spell8 = new Spell("Rock armour"); Spell spell9 = new Spell("Light"); Spell spell10 = new Spell("Bee swarm"); Spell spell11 = new Spell("Haste"); Spell spell12 = new Spell("Levitation"); Spell spell13 = new Spell("Magic lock"); Spell spell14 = new Spell("Summon hell bat"); Spell spell15 = new Spell("Water walking"); Spell spell16 = new Spell("Magic storm"); Spell spell17 = new Spell("Entangle"); SpellDao spellDao = new SpellDaoImpl(); spellDao.persist(spell1); spellDao.persist(spell2); spellDao.persist(spell3); spellDao.persist(spell4); spellDao.persist(spell5); spellDao.persist(spell6); spellDao.persist(spell7); spellDao.persist(spell8); spellDao.persist(spell9); spellDao.persist(spell10); spellDao.persist(spell11); spellDao.persist(spell12); spellDao.persist(spell13); spellDao.persist(spell14); spellDao.persist(spell15); spellDao.persist(spell16); spellDao.persist(spell17); // spellbooks SpellbookDao spellbookDao = new SpellbookDaoImpl(); Spellbook spellbook1 = new Spellbook("Book of Orgymon"); spellbookDao.persist(spellbook1); spellbook1.addSpell(spell1); spellbook1.addSpell(spell2); spellbook1.addSpell(spell3); spellbook1.addSpell(spell4); spellbookDao.merge(spellbook1); Spellbook spellbook2 = new Spellbook("Book of Aras"); spellbookDao.persist(spellbook2); spellbook2.addSpell(spell5); spellbook2.addSpell(spell6); spellbookDao.merge(spellbook2); Spellbook spellbook3 = new Spellbook("Book of Kritior"); spellbookDao.persist(spellbook3); spellbook3.addSpell(spell7); spellbook3.addSpell(spell8); spellbook3.addSpell(spell9); spellbookDao.merge(spellbook3); Spellbook spellbook4 = new Spellbook("Book of Tamaex"); spellbookDao.persist(spellbook4); spellbook4.addSpell(spell10); spellbook4.addSpell(spell11); spellbook4.addSpell(spell12); spellbookDao.merge(spellbook4); Spellbook spellbook5 = new Spellbook("Book of Idores"); spellbookDao.persist(spellbook5); spellbook5.addSpell(spell13); spellbookDao.merge(spellbook5); Spellbook spellbook6 = new Spellbook("Book of Opaen"); spellbookDao.persist(spellbook6); spellbook6.addSpell(spell14); spellbook6.addSpell(spell15); spellbookDao.merge(spellbook6); Spellbook spellbook7 = new Spellbook("Book of Kihione"); spellbookDao.persist(spellbook7); spellbook7.addSpell(spell16); spellbook7.addSpell(spell17); spellbookDao.merge(spellbook7); // wizards WizardDao wizardDao = new WizardDaoImpl(); Wizard wizard1 = new Wizard("Aderlard Boud"); wizardDao.persist(wizard1); wizard1.addSpellbook(spellbookDao.findByName("Book of Orgymon")); wizard1.addSpellbook(spellbookDao.findByName("Book of Aras")); wizardDao.merge(wizard1); Wizard wizard2 = new Wizard("Anaxis Bajraktari"); wizardDao.persist(wizard2); wizard2.addSpellbook(spellbookDao.findByName("Book of Kritior")); wizard2.addSpellbook(spellbookDao.findByName("Book of Tamaex")); wizardDao.merge(wizard2); Wizard wizard3 = new Wizard("Xuban Munoa"); wizardDao.persist(wizard3); wizard3.addSpellbook(spellbookDao.findByName("Book of Idores")); wizard3.addSpellbook(spellbookDao.findByName("Book of Opaen")); wizardDao.merge(wizard3); Wizard wizard4 = new Wizard("Blasius Dehooge"); wizardDao.persist(wizard4); wizard4.addSpellbook(spellbookDao.findByName("Book of Kihione")); wizardDao.merge(wizard4); } /** * Query the data */ public static void queryData() { MagicService service = new MagicServiceImpl(new WizardDaoImpl(), new SpellbookDaoImpl(), new SpellDaoImpl()); System.out.println("Enumerating all wizards"); for (Wizard w : service.findAllWizards()) { System.out.println(w.getName()); } System.out.println("Enumerating all spellbooks"); for (Spellbook s : service.findAllSpellbooks()) { System.out.println(s.getName()); } System.out.println("Enumerating all spells"); for (Spell s : service.findAllSpells()) { System.out.println(s.getName()); } System.out.println("Find wizards with spellbook 'Book of Idores'"); List wizardsWithSpellbook = service.findWizardsWithSpellbook("Book of Idores"); for (Wizard w : wizardsWithSpellbook) { System.out.println(String.format("%s has 'Book of Idores'", w.getName())); } System.out.println("Find wizards with spell 'Fireball'"); List wizardsWithSpell = service.findWizardsWithSpell("Fireball"); for (Wizard w : wizardsWithSpell) { System.out.println(String.format("%s has 'Fireball'", w.getName())); } } } java-design-patterns-1.9.0/service-layer/src/main/java/com/iluwatar/servicelayer/common/000077500000000000000000000000001264154357600313655ustar00rootroot00000000000000BaseEntity.java000066400000000000000000000016301264154357600342200ustar00rootroot00000000000000java-design-patterns-1.9.0/service-layer/src/main/java/com/iluwatar/servicelayer/commonpackage com.iluwatar.servicelayer.common; import javax.persistence.Inheritance; import javax.persistence.InheritanceType; import javax.persistence.MappedSuperclass; import javax.persistence.Version; /** * * Base class for entities. * */ @MappedSuperclass @Inheritance(strategy = InheritanceType.TABLE_PER_CLASS) public abstract class BaseEntity { @Version private Long version; /** * Indicates the unique id of this entity * * @return The id of the entity, or 'null' when not persisted */ public abstract Long getId(); /** * Set the id of this entity * * @param id The new id */ public abstract void setId(Long id); /** * Get the name of this entity * * @return The name of the entity */ public abstract String getName(); /** * Set the name of this entity * * @param name The new name */ public abstract void setName(final String name); } java-design-patterns-1.9.0/service-layer/src/main/java/com/iluwatar/servicelayer/common/Dao.java000066400000000000000000000004321264154357600327320ustar00rootroot00000000000000package com.iluwatar.servicelayer.common; import java.util.List; /** * * Dao interface. * * @param * */ public interface Dao { E find(Long id); void persist(E entity); E merge(E entity); void delete(E entity); List findAll(); } DaoBaseImpl.java000066400000000000000000000053671264154357600343040ustar00rootroot00000000000000java-design-patterns-1.9.0/service-layer/src/main/java/com/iluwatar/servicelayer/commonpackage com.iluwatar.servicelayer.common; import java.lang.reflect.ParameterizedType; import java.util.List; import org.hibernate.Criteria; import org.hibernate.Session; import org.hibernate.Transaction; import org.hibernate.criterion.Restrictions; import com.iluwatar.servicelayer.hibernate.HibernateUtil; /** * * Base class for Dao implementations. * * @param * */ public abstract class DaoBaseImpl implements Dao { @SuppressWarnings("unchecked") protected Class persistentClass = (Class) ((ParameterizedType) getClass() .getGenericSuperclass()).getActualTypeArguments()[0]; protected Session getSession() { return HibernateUtil.getSessionFactory().openSession(); } @Override public E find(Long id) { Session session = getSession(); Transaction tx = null; E result = null; try { tx = session.beginTransaction(); Criteria criteria = session.createCriteria(persistentClass); criteria.add(Restrictions.idEq(id)); result = (E) criteria.uniqueResult(); tx.commit(); } catch (Exception e) { if (tx != null) { tx.rollback(); } throw e; } finally { session.close(); } return result; } @Override public void persist(E entity) { Session session = getSession(); Transaction tx = null; try { tx = session.beginTransaction(); session.persist(entity); tx.commit(); } catch (Exception e) { if (tx != null) { tx.rollback(); } throw e; } finally { session.close(); } } @Override public E merge(E entity) { Session session = getSession(); Transaction tx = null; E result = null; try { tx = session.beginTransaction(); result = (E) session.merge(entity); tx.commit(); } catch (Exception e) { if (tx != null) { tx.rollback(); } throw e; } finally { session.close(); } return result; } @Override public void delete(E entity) { Session session = getSession(); Transaction tx = null; try { tx = session.beginTransaction(); session.delete(entity); tx.commit(); } catch (Exception e) { if (tx != null) { tx.rollback(); } throw e; } finally { session.close(); } } @Override public List findAll() { Session session = getSession(); Transaction tx = null; List result = null; try { tx = session.beginTransaction(); Criteria criteria = session.createCriteria(persistentClass); result = criteria.list(); } catch (Exception e) { if (tx != null) { tx.rollback(); } throw e; } finally { session.close(); } return result; } } java-design-patterns-1.9.0/service-layer/src/main/java/com/iluwatar/servicelayer/hibernate/000077500000000000000000000000001264154357600320365ustar00rootroot00000000000000HibernateUtil.java000066400000000000000000000034471264154357600353710ustar00rootroot00000000000000java-design-patterns-1.9.0/service-layer/src/main/java/com/iluwatar/servicelayer/hibernatepackage com.iluwatar.servicelayer.hibernate; import com.iluwatar.servicelayer.spell.Spell; import com.iluwatar.servicelayer.spellbook.Spellbook; import com.iluwatar.servicelayer.wizard.Wizard; import org.hibernate.SessionFactory; import org.hibernate.cfg.Configuration; /** * Produces the Hibernate {@link SessionFactory}. */ public class HibernateUtil { /** * The cached session factory */ private static volatile SessionFactory sessionFactory; private HibernateUtil() { } /** * Create the current session factory instance, create a new one when there is none yet. * * @return The session factory */ public static synchronized SessionFactory getSessionFactory() { if (sessionFactory == null) { try { sessionFactory = new Configuration().addAnnotatedClass(Wizard.class).addAnnotatedClass(Spellbook.class) .addAnnotatedClass(Spell.class) .setProperty("hibernate.dialect", "org.hibernate.dialect.H2Dialect") .setProperty("hibernate.connection.url", "jdbc:h2:mem:test;DB_CLOSE_DELAY=-1") .setProperty("hibernate.current_session_context_class", "thread") .setProperty("hibernate.show_sql", "true") .setProperty("hibernate.hbm2ddl.auto", "create-drop").buildSessionFactory(); } catch (Throwable ex) { System.err.println("Initial SessionFactory creation failed." + ex); throw new ExceptionInInitializerError(ex); } } return sessionFactory; } /** * Drop the current connection, resulting in a create-drop clean database next time. This is * mainly used for JUnit testing since one test should not influence the other */ public static void dropSession() { getSessionFactory().close(); sessionFactory = null; } } java-design-patterns-1.9.0/service-layer/src/main/java/com/iluwatar/servicelayer/magic/000077500000000000000000000000001264154357600311555ustar00rootroot00000000000000MagicService.java000066400000000000000000000007631264154357600343100ustar00rootroot00000000000000java-design-patterns-1.9.0/service-layer/src/main/java/com/iluwatar/servicelayer/magicpackage com.iluwatar.servicelayer.magic; import java.util.List; import com.iluwatar.servicelayer.spell.Spell; import com.iluwatar.servicelayer.spellbook.Spellbook; import com.iluwatar.servicelayer.wizard.Wizard; /** * * Service interface. * */ public interface MagicService { List findAllWizards(); List findAllSpellbooks(); List findAllSpells(); List findWizardsWithSpellbook(String name); List findWizardsWithSpell(String name); } MagicServiceImpl.java000066400000000000000000000027631264154357600351340ustar00rootroot00000000000000java-design-patterns-1.9.0/service-layer/src/main/java/com/iluwatar/servicelayer/magicpackage com.iluwatar.servicelayer.magic; import java.util.ArrayList; import java.util.List; import com.iluwatar.servicelayer.spell.Spell; import com.iluwatar.servicelayer.spell.SpellDao; import com.iluwatar.servicelayer.spellbook.Spellbook; import com.iluwatar.servicelayer.spellbook.SpellbookDao; import com.iluwatar.servicelayer.wizard.Wizard; import com.iluwatar.servicelayer.wizard.WizardDao; /** * * Service implementation. * */ public class MagicServiceImpl implements MagicService { private WizardDao wizardDao; private SpellbookDao spellbookDao; private SpellDao spellDao; /** * Constructor */ public MagicServiceImpl(WizardDao wizardDao, SpellbookDao spellbookDao, SpellDao spellDao) { this.wizardDao = wizardDao; this.spellbookDao = spellbookDao; this.spellDao = spellDao; } @Override public List findAllWizards() { return wizardDao.findAll(); } @Override public List findAllSpellbooks() { return spellbookDao.findAll(); } @Override public List findAllSpells() { return spellDao.findAll(); } @Override public List findWizardsWithSpellbook(String name) { Spellbook spellbook = spellbookDao.findByName(name); return new ArrayList(spellbook.getWizards()); } @Override public List findWizardsWithSpell(String name) { Spell spell = spellDao.findByName(name); Spellbook spellbook = spell.getSpellbook(); return new ArrayList(spellbook.getWizards()); } } java-design-patterns-1.9.0/service-layer/src/main/java/com/iluwatar/servicelayer/spell/000077500000000000000000000000001264154357600312145ustar00rootroot00000000000000java-design-patterns-1.9.0/service-layer/src/main/java/com/iluwatar/servicelayer/spell/Spell.java000066400000000000000000000023201264154357600331330ustar00rootroot00000000000000package com.iluwatar.servicelayer.spell; import javax.persistence.Column; import javax.persistence.Entity; import javax.persistence.GeneratedValue; import javax.persistence.Id; import javax.persistence.JoinColumn; import javax.persistence.ManyToOne; import javax.persistence.Table; import com.iluwatar.servicelayer.common.BaseEntity; import com.iluwatar.servicelayer.spellbook.Spellbook; /** * * Spell entity. * */ @Entity @Table(name = "SPELL") public class Spell extends BaseEntity { private String name; public Spell() {} public Spell(String name) { this(); this.name = name; } @Id @GeneratedValue @Column(name = "SPELL_ID") private Long id; public Long getId() { return id; } public void setId(Long id) { this.id = id; } @ManyToOne @JoinColumn(name = "SPELLBOOK_ID_FK", referencedColumnName = "SPELLBOOK_ID") private Spellbook spellbook; public String getName() { return name; } public void setName(String name) { this.name = name; } public Spellbook getSpellbook() { return spellbook; } public void setSpellbook(Spellbook spellbook) { this.spellbook = spellbook; } @Override public String toString() { return name; } } java-design-patterns-1.9.0/service-layer/src/main/java/com/iluwatar/servicelayer/spell/SpellDao.java000066400000000000000000000003221264154357600335570ustar00rootroot00000000000000package com.iluwatar.servicelayer.spell; import com.iluwatar.servicelayer.common.Dao; /** * * SpellDao interface. * */ public interface SpellDao extends Dao { Spell findByName(String name); } SpellDaoImpl.java000066400000000000000000000016031264154357600343250ustar00rootroot00000000000000java-design-patterns-1.9.0/service-layer/src/main/java/com/iluwatar/servicelayer/spellpackage com.iluwatar.servicelayer.spell; import com.iluwatar.servicelayer.common.DaoBaseImpl; import org.hibernate.Criteria; import org.hibernate.Session; import org.hibernate.Transaction; import org.hibernate.criterion.Restrictions; /** * * SpellDao implementation. * */ public class SpellDaoImpl extends DaoBaseImpl implements SpellDao { @Override public Spell findByName(String name) { Session session = getSession(); Transaction tx = null; Spell result = null; try { tx = session.beginTransaction(); Criteria criteria = session.createCriteria(persistentClass); criteria.add(Restrictions.eq("name", name)); result = (Spell) criteria.uniqueResult(); tx.commit(); } catch (Exception e) { if (tx != null) { tx.rollback(); } throw e; } finally { session.close(); } return result; } } java-design-patterns-1.9.0/service-layer/src/main/java/com/iluwatar/servicelayer/spellbook/000077500000000000000000000000001264154357600320675ustar00rootroot00000000000000Spellbook.java000066400000000000000000000034201264154357600346040ustar00rootroot00000000000000java-design-patterns-1.9.0/service-layer/src/main/java/com/iluwatar/servicelayer/spellbookpackage com.iluwatar.servicelayer.spellbook; import java.util.HashSet; import java.util.Set; import javax.persistence.CascadeType; import javax.persistence.Column; import javax.persistence.Entity; import javax.persistence.FetchType; import javax.persistence.GeneratedValue; import javax.persistence.Id; import javax.persistence.ManyToMany; import javax.persistence.OneToMany; import javax.persistence.Table; import com.iluwatar.servicelayer.common.BaseEntity; import com.iluwatar.servicelayer.spell.Spell; import com.iluwatar.servicelayer.wizard.Wizard; /** * * Spellbook entity. * */ @Entity @Table(name = "SPELLBOOK") public class Spellbook extends BaseEntity { public Spellbook() { spells = new HashSet(); wizards = new HashSet(); } public Spellbook(String name) { this(); this.name = name; } @Id @GeneratedValue @Column(name = "SPELLBOOK_ID") private Long id; public Long getId() { return id; } public void setId(Long id) { this.id = id; } private String name; @ManyToMany(mappedBy = "spellbooks", fetch = FetchType.EAGER) private Set wizards; @OneToMany(mappedBy = "spellbook", orphanRemoval = true, cascade = CascadeType.ALL) private Set spells; public String getName() { return name; } public void setName(String name) { this.name = name; } public Set getWizards() { return wizards; } public void setWizards(Set wizards) { this.wizards = wizards; } public Set getSpells() { return spells; } public void setSpells(Set spells) { this.spells = spells; } public void addSpell(Spell spell) { spell.setSpellbook(this); spells.add(spell); } @Override public String toString() { return name; } } SpellbookDao.java000066400000000000000000000003461264154357600352340ustar00rootroot00000000000000java-design-patterns-1.9.0/service-layer/src/main/java/com/iluwatar/servicelayer/spellbookpackage com.iluwatar.servicelayer.spellbook; import com.iluwatar.servicelayer.common.Dao; /** * * SpellbookDao interface. * */ public interface SpellbookDao extends Dao { Spellbook findByName(String name); } SpellbookDaoImpl.java000066400000000000000000000017471264154357600360640ustar00rootroot00000000000000java-design-patterns-1.9.0/service-layer/src/main/java/com/iluwatar/servicelayer/spellbookpackage com.iluwatar.servicelayer.spellbook; import org.hibernate.Criteria; import org.hibernate.Session; import org.hibernate.Transaction; import org.hibernate.criterion.Restrictions; import com.iluwatar.servicelayer.common.DaoBaseImpl; /** * * SpellbookDao implementation. * */ public class SpellbookDaoImpl extends DaoBaseImpl implements SpellbookDao { @Override public Spellbook findByName(String name) { Session session = getSession(); Transaction tx = null; Spellbook result = null; try { tx = session.beginTransaction(); Criteria criteria = session.createCriteria(persistentClass); criteria.add(Restrictions.eq("name", name)); result = (Spellbook) criteria.uniqueResult(); result.getSpells().size(); result.getWizards().size(); tx.commit(); } catch (Exception e) { if (tx != null) { tx.rollback(); } throw e; } finally { session.close(); } return result; } } java-design-patterns-1.9.0/service-layer/src/main/java/com/iluwatar/servicelayer/wizard/000077500000000000000000000000001264154357600313755ustar00rootroot00000000000000java-design-patterns-1.9.0/service-layer/src/main/java/com/iluwatar/servicelayer/wizard/Wizard.java000066400000000000000000000026271264154357600335070ustar00rootroot00000000000000package com.iluwatar.servicelayer.wizard; import java.util.HashSet; import java.util.Set; import javax.persistence.CascadeType; import javax.persistence.Column; import javax.persistence.Entity; import javax.persistence.GeneratedValue; import javax.persistence.Id; import javax.persistence.ManyToMany; import javax.persistence.Table; import com.iluwatar.servicelayer.common.BaseEntity; import com.iluwatar.servicelayer.spellbook.Spellbook; /** * * Wizard entity. * */ @Entity @Table(name = "WIZARD") public class Wizard extends BaseEntity { public Wizard() { spellbooks = new HashSet(); } public Wizard(String name) { this(); this.name = name; } @Id @GeneratedValue @Column(name = "WIZARD_ID") private Long id; public Long getId() { return id; } public void setId(Long id) { this.id = id; } private String name; @ManyToMany(cascade = CascadeType.ALL) private Set spellbooks; public String getName() { return name; } public void setName(String name) { this.name = name; } public Set getSpellbooks() { return spellbooks; } public void setSpellbooks(Set spellbooks) { this.spellbooks = spellbooks; } public void addSpellbook(Spellbook spellbook) { spellbook.getWizards().add(this); spellbooks.add(spellbook); } @Override public String toString() { return name; } } WizardDao.java000066400000000000000000000003271264154357600340470ustar00rootroot00000000000000java-design-patterns-1.9.0/service-layer/src/main/java/com/iluwatar/servicelayer/wizardpackage com.iluwatar.servicelayer.wizard; import com.iluwatar.servicelayer.common.Dao; /** * * WizardDao interface. * */ public interface WizardDao extends Dao { Wizard findByName(String name); } WizardDaoImpl.java000066400000000000000000000020321264154357600346640ustar00rootroot00000000000000java-design-patterns-1.9.0/service-layer/src/main/java/com/iluwatar/servicelayer/wizardpackage com.iluwatar.servicelayer.wizard; import org.hibernate.Criteria; import org.hibernate.Session; import org.hibernate.Transaction; import org.hibernate.criterion.Restrictions; import com.iluwatar.servicelayer.common.DaoBaseImpl; import com.iluwatar.servicelayer.spellbook.Spellbook; /** * * WizardDao implementation. * */ public class WizardDaoImpl extends DaoBaseImpl implements WizardDao { @Override public Wizard findByName(String name) { Session session = getSession(); Transaction tx = null; Wizard result = null; try { tx = session.beginTransaction(); Criteria criteria = session.createCriteria(persistentClass); criteria.add(Restrictions.eq("name", name)); result = (Wizard) criteria.uniqueResult(); for (Spellbook s : result.getSpellbooks()) { s.getSpells().size(); } tx.commit(); } catch (Exception e) { if (tx != null) { tx.rollback(); } throw e; } finally { session.close(); } return result; } } java-design-patterns-1.9.0/service-layer/src/test/000077500000000000000000000000001264154357600221045ustar00rootroot00000000000000java-design-patterns-1.9.0/service-layer/src/test/java/000077500000000000000000000000001264154357600230255ustar00rootroot00000000000000java-design-patterns-1.9.0/service-layer/src/test/java/com/000077500000000000000000000000001264154357600236035ustar00rootroot00000000000000java-design-patterns-1.9.0/service-layer/src/test/java/com/iluwatar/000077500000000000000000000000001264154357600254335ustar00rootroot00000000000000java-design-patterns-1.9.0/service-layer/src/test/java/com/iluwatar/servicelayer/000077500000000000000000000000001264154357600301305ustar00rootroot00000000000000java-design-patterns-1.9.0/service-layer/src/test/java/com/iluwatar/servicelayer/app/000077500000000000000000000000001264154357600307105ustar00rootroot00000000000000java-design-patterns-1.9.0/service-layer/src/test/java/com/iluwatar/servicelayer/app/AppTest.java000066400000000000000000000005731264154357600331400ustar00rootroot00000000000000package com.iluwatar.servicelayer.app; import com.iluwatar.servicelayer.hibernate.HibernateUtil; import org.junit.After; import org.junit.Test; /** * * Application test * */ public class AppTest { @Test public void test() { String[] args = {}; App.main(args); } @After public void tearDown() throws Exception { HibernateUtil.dropSession(); } } java-design-patterns-1.9.0/service-layer/src/test/java/com/iluwatar/servicelayer/common/000077500000000000000000000000001264154357600314205ustar00rootroot00000000000000BaseDaoTest.java000066400000000000000000000063141264154357600343460ustar00rootroot00000000000000java-design-patterns-1.9.0/service-layer/src/test/java/com/iluwatar/servicelayer/commonpackage com.iluwatar.servicelayer.common; import com.iluwatar.servicelayer.hibernate.HibernateUtil; import org.junit.After; import org.junit.Before; import org.junit.Test; import java.util.List; import java.util.concurrent.atomic.AtomicInteger; import java.util.function.Function; import static org.junit.Assert.assertEquals; import static org.junit.Assert.assertNotNull; import static org.junit.Assert.assertNull; /** * Date: 12/28/15 - 10:53 PM * * @author Jeroen Meulemeester */ public abstract class BaseDaoTest> { /** * The number of entities stored before each test */ private static final int INITIAL_COUNT = 5; /** * The unique id generator, shared between all entities */ private static final AtomicInteger ID_GENERATOR = new AtomicInteger(); /** * Factory, used to create new entity instances with the given name */ private final Function factory; /** * The tested data access object */ private final D dao; /** * Create a new test using the given factory and dao * * @param factory The factory, used to create new entity instances with the given name * @param dao The tested data access object */ public BaseDaoTest(final Function factory, final D dao) { this.factory = factory; this.dao = dao; } @Before public void setUp() throws Exception { for (int i = 0; i < INITIAL_COUNT; i++) { final String className = dao.persistentClass.getSimpleName(); final String entityName = String.format("%s%d", className, ID_GENERATOR.incrementAndGet()); this.dao.persist(this.factory.apply(entityName)); } } @After public void tearDown() throws Exception { HibernateUtil.dropSession(); } protected final D getDao() { return this.dao; } @Test public void testFind() throws Exception { final List all = this.dao.findAll(); for (final E entity : all) { final E byId = this.dao.find(entity.getId()); assertNotNull(byId); assertEquals(byId.getId(), byId.getId()); } } @Test public void testDelete() throws Exception { final List originalEntities = this.dao.findAll(); this.dao.delete(originalEntities.get(1)); this.dao.delete(originalEntities.get(2)); final List entitiesLeft = this.dao.findAll(); assertNotNull(entitiesLeft); assertEquals(INITIAL_COUNT - 2, entitiesLeft.size()); } @Test public void testFindAll() throws Exception { final List all = this.dao.findAll(); assertNotNull(all); assertEquals(INITIAL_COUNT, all.size()); } @Test public void testSetId() throws Exception { final E entity = this.factory.apply("name"); assertNull(entity.getId()); final Long expectedId = Long.valueOf(1); entity.setId(expectedId); assertEquals(expectedId, entity.getId()); } @Test public void testSetName() throws Exception { final E entity = this.factory.apply("name"); assertEquals("name", entity.getName()); assertEquals("name", entity.toString()); final String expectedName = "new name"; entity.setName(expectedName); assertEquals(expectedName, entity.getName()); assertEquals(expectedName, entity.toString()); } }java-design-patterns-1.9.0/service-layer/src/test/java/com/iluwatar/servicelayer/magic/000077500000000000000000000000001264154357600312105ustar00rootroot00000000000000MagicServiceImplTest.java000066400000000000000000000112521264154357600360200ustar00rootroot00000000000000java-design-patterns-1.9.0/service-layer/src/test/java/com/iluwatar/servicelayer/magicpackage com.iluwatar.servicelayer.magic; import com.iluwatar.servicelayer.spell.Spell; import com.iluwatar.servicelayer.spell.SpellDao; import com.iluwatar.servicelayer.spellbook.Spellbook; import com.iluwatar.servicelayer.spellbook.SpellbookDao; import com.iluwatar.servicelayer.wizard.Wizard; import com.iluwatar.servicelayer.wizard.WizardDao; import org.junit.Test; import java.util.HashSet; import java.util.List; import java.util.Set; import static org.junit.Assert.assertEquals; import static org.junit.Assert.assertNotNull; import static org.mockito.Matchers.eq; import static org.mockito.Mockito.mock; import static org.mockito.Mockito.verify; import static org.mockito.Mockito.verifyNoMoreInteractions; import static org.mockito.Mockito.verifyZeroInteractions; import static org.mockito.Mockito.when; /** * Date: 12/29/15 - 12:06 AM * * @author Jeroen Meulemeester */ public class MagicServiceImplTest { @Test public void testFindAllWizards() throws Exception { final WizardDao wizardDao = mock(WizardDao.class); final SpellbookDao spellbookDao = mock(SpellbookDao.class); final SpellDao spellDao = mock(SpellDao.class); final MagicServiceImpl service = new MagicServiceImpl(wizardDao, spellbookDao, spellDao); verifyZeroInteractions(wizardDao, spellbookDao, spellDao); service.findAllWizards(); verify(wizardDao).findAll(); verifyNoMoreInteractions(wizardDao, spellbookDao, spellDao); } @Test public void testFindAllSpellbooks() throws Exception { final WizardDao wizardDao = mock(WizardDao.class); final SpellbookDao spellbookDao = mock(SpellbookDao.class); final SpellDao spellDao = mock(SpellDao.class); final MagicServiceImpl service = new MagicServiceImpl(wizardDao, spellbookDao, spellDao); verifyZeroInteractions(wizardDao, spellbookDao, spellDao); service.findAllSpellbooks(); verify(spellbookDao).findAll(); verifyNoMoreInteractions(wizardDao, spellbookDao, spellDao); } @Test public void testFindAllSpells() throws Exception { final WizardDao wizardDao = mock(WizardDao.class); final SpellbookDao spellbookDao = mock(SpellbookDao.class); final SpellDao spellDao = mock(SpellDao.class); final MagicServiceImpl service = new MagicServiceImpl(wizardDao, spellbookDao, spellDao); verifyZeroInteractions(wizardDao, spellbookDao, spellDao); service.findAllSpells(); verify(spellDao).findAll(); verifyNoMoreInteractions(wizardDao, spellbookDao, spellDao); } @Test public void testFindWizardsWithSpellbook() throws Exception { final String bookname = "bookname"; final Spellbook spellbook = mock(Spellbook.class); final Set wizards = new HashSet<>(); wizards.add(mock(Wizard.class)); wizards.add(mock(Wizard.class)); wizards.add(mock(Wizard.class)); when(spellbook.getWizards()).thenReturn(wizards); final SpellbookDao spellbookDao = mock(SpellbookDao.class); when(spellbookDao.findByName(eq(bookname))).thenReturn(spellbook); final WizardDao wizardDao = mock(WizardDao.class); final SpellDao spellDao = mock(SpellDao.class); final MagicServiceImpl service = new MagicServiceImpl(wizardDao, spellbookDao, spellDao); verifyZeroInteractions(wizardDao, spellbookDao, spellDao, spellbook); final List result = service.findWizardsWithSpellbook(bookname); verify(spellbookDao).findByName(eq(bookname)); verify(spellbook).getWizards(); assertNotNull(result); assertEquals(3, result.size()); verifyNoMoreInteractions(wizardDao, spellbookDao, spellDao); } @Test public void testFindWizardsWithSpell() throws Exception { final Set wizards = new HashSet<>(); wizards.add(mock(Wizard.class)); wizards.add(mock(Wizard.class)); wizards.add(mock(Wizard.class)); final Spellbook spellbook = mock(Spellbook.class); when(spellbook.getWizards()).thenReturn(wizards); final SpellbookDao spellbookDao = mock(SpellbookDao.class); final WizardDao wizardDao = mock(WizardDao.class); final Spell spell = mock(Spell.class); when(spell.getSpellbook()).thenReturn(spellbook); final String spellName = "spellname"; final SpellDao spellDao = mock(SpellDao.class); when(spellDao.findByName(eq(spellName))).thenReturn(spell); final MagicServiceImpl service = new MagicServiceImpl(wizardDao, spellbookDao, spellDao); verifyZeroInteractions(wizardDao, spellbookDao, spellDao, spellbook); final List result = service.findWizardsWithSpell(spellName); verify(spellDao).findByName(eq(spellName)); verify(spellbook).getWizards(); assertNotNull(result); assertEquals(3, result.size()); verifyNoMoreInteractions(wizardDao, spellbookDao, spellDao); } } java-design-patterns-1.9.0/service-layer/src/test/java/com/iluwatar/servicelayer/spell/000077500000000000000000000000001264154357600312475ustar00rootroot00000000000000SpellDaoImplTest.java000066400000000000000000000015531264154357600352240ustar00rootroot00000000000000java-design-patterns-1.9.0/service-layer/src/test/java/com/iluwatar/servicelayer/spellpackage com.iluwatar.servicelayer.spell; import com.iluwatar.servicelayer.common.BaseDaoTest; import org.junit.Test; import java.util.List; import static org.junit.Assert.assertEquals; import static org.junit.Assert.assertNotNull; /** * Date: 12/28/15 - 11:02 PM * * @author Jeroen Meulemeester */ public class SpellDaoImplTest extends BaseDaoTest { public SpellDaoImplTest() { super(Spell::new, new SpellDaoImpl()); } @Test public void testFindByName() throws Exception { final SpellDaoImpl dao = getDao(); final List allSpells = dao.findAll(); for (final Spell spell : allSpells) { final Spell spellByName = dao.findByName(spell.getName()); assertNotNull(spellByName); assertEquals(spell.getId(), spellByName.getId()); assertEquals(spell.getName(), spellByName.getName()); } } } java-design-patterns-1.9.0/service-layer/src/test/java/com/iluwatar/servicelayer/spellbook/000077500000000000000000000000001264154357600321225ustar00rootroot00000000000000SpellbookDaoImplTest.java000066400000000000000000000016211264154357600367460ustar00rootroot00000000000000java-design-patterns-1.9.0/service-layer/src/test/java/com/iluwatar/servicelayer/spellbookpackage com.iluwatar.servicelayer.spellbook; import com.iluwatar.servicelayer.common.BaseDaoTest; import org.junit.Test; import java.util.List; import static org.junit.Assert.assertEquals; import static org.junit.Assert.assertNotNull; /** * Date: 12/28/15 - 11:44 PM * * @author Jeroen Meulemeester */ public class SpellbookDaoImplTest extends BaseDaoTest { public SpellbookDaoImplTest() { super(Spellbook::new, new SpellbookDaoImpl()); } @Test public void testFindByName() throws Exception { final SpellbookDaoImpl dao = getDao(); final List allBooks = dao.findAll(); for (final Spellbook book : allBooks) { final Spellbook spellByName = dao.findByName(book.getName()); assertNotNull(spellByName); assertEquals(book.getId(), spellByName.getId()); assertEquals(book.getName(), spellByName.getName()); } } } java-design-patterns-1.9.0/service-layer/src/test/java/com/iluwatar/servicelayer/wizard/000077500000000000000000000000001264154357600314305ustar00rootroot00000000000000WizardDaoImplTest.java000066400000000000000000000015441264154357600355660ustar00rootroot00000000000000java-design-patterns-1.9.0/service-layer/src/test/java/com/iluwatar/servicelayer/wizardpackage com.iluwatar.servicelayer.wizard; import com.iluwatar.servicelayer.common.BaseDaoTest; import org.junit.Test; import java.util.List; import static org.junit.Assert.assertEquals; import static org.junit.Assert.assertNotNull; /** * Date: 12/28/15 - 11:46 PM * * @author Jeroen Meulemeester */ public class WizardDaoImplTest extends BaseDaoTest { public WizardDaoImplTest() { super(Wizard::new, new WizardDaoImpl()); 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The service Locator pattern addresses this expensive lookup by making use of caching techniques ie. for the very first time a particular service is requested, the service Locator looks up in JNDI, fetched the relevant service and then finally caches this service object. Now, further lookups of the same service via Service Locator is done in its cache which improves the performance of application to great extent. **Typical Use Case:** * when network hits are expensive and time consuming * lookups of services are done quite frequently * large number of services are being used **Credits:** * [J2EE Design Patterns](http://www.amazon.com/J2EE-Design-Patterns-William-Crawford/dp/0596004273/ref=sr_1_2) java-design-patterns-1.9.0/service-locator/pom.xml000066400000000000000000000011601264154357600222000ustar00rootroot00000000000000 4.0.0 com.iluwatar java-design-patterns 1.9.0 service-locator junit junit test java-design-patterns-1.9.0/service-locator/src/000077500000000000000000000000001264154357600214545ustar00rootroot00000000000000java-design-patterns-1.9.0/service-locator/src/main/000077500000000000000000000000001264154357600224005ustar00rootroot00000000000000java-design-patterns-1.9.0/service-locator/src/main/java/000077500000000000000000000000001264154357600233215ustar00rootroot00000000000000java-design-patterns-1.9.0/service-locator/src/main/java/com/000077500000000000000000000000001264154357600240775ustar00rootroot00000000000000java-design-patterns-1.9.0/service-locator/src/main/java/com/iluwatar/000077500000000000000000000000001264154357600257275ustar00rootroot00000000000000java-design-patterns-1.9.0/service-locator/src/main/java/com/iluwatar/servicelocator/000077500000000000000000000000001264154357600307535ustar00rootroot00000000000000java-design-patterns-1.9.0/service-locator/src/main/java/com/iluwatar/servicelocator/App.java000066400000000000000000000017761264154357600323510ustar00rootroot00000000000000package com.iluwatar.servicelocator; /** * * The Service Locator pattern is a design pattern used in software development to encapsulate the * processes involved in obtaining a service with a strong abstraction layer. This pattern uses a * central registry known as the "service locator", which on request returns the information * necessary to perform a certain task. *

* In this example we use the Service locator pattern to lookup JNDI-services and cache them for * subsequent requests. *

* * @author saifasif * */ public class App { /** * Program entry point * * @param args command line args */ public static void main(String[] args) { Service service = ServiceLocator.getService("jndi/serviceA"); service.execute(); service = ServiceLocator.getService("jndi/serviceB"); service.execute(); service = ServiceLocator.getService("jndi/serviceA"); service.execute(); service = ServiceLocator.getService("jndi/serviceA"); service.execute(); } } InitContext.java000066400000000000000000000016221264154357600340100ustar00rootroot00000000000000java-design-patterns-1.9.0/service-locator/src/main/java/com/iluwatar/servicelocatorpackage com.iluwatar.servicelocator; /** * For JNDI lookup of services from the web.xml. Will match name of the service name that is being * requested and return a newly created service object with the name * * @author saifasif */ public class InitContext { /** * Perform the lookup based on the service name. The returned object will need to be casted into a * {@link Service} * * @param serviceName a string * @return an {@link Object} */ public Object lookup(String serviceName) { if (serviceName.equals("jndi/serviceA")) { System.out.println("Looking up service A and creating new service for A"); return new ServiceImpl("jndi/serviceA"); } else if (serviceName.equals("jndi/serviceB")) { System.out.println("Looking up service B and creating new service for B"); return new ServiceImpl("jndi/serviceB"); } else { return null; } } } java-design-patterns-1.9.0/service-locator/src/main/java/com/iluwatar/servicelocator/Service.java000066400000000000000000000010211264154357600332100ustar00rootroot00000000000000package com.iluwatar.servicelocator; /** * This is going to be the parent service interface which we will use to create our services. All * services will have a

  • service name
  • unique id
  • execution work flow
    • * * @author saifasif * */ public interface Service { /* * The human readable name of the service */ String getName(); /* * Unique ID of the particular service */ int getId(); /* * The workflow method that defines what this service does */ void execute(); } ServiceCache.java000066400000000000000000000026171264154357600340710ustar00rootroot00000000000000java-design-patterns-1.9.0/service-locator/src/main/java/com/iluwatar/servicelocatorpackage com.iluwatar.servicelocator; import java.util.HashMap; import java.util.Map; /** * The service cache implementation which will cache services that are being created. On first hit, * the cache will be empty and thus any service that is being requested, will be created fresh and * then placed into the cache map. On next hit, if same service name will be requested, it will be * returned from the cache * * @author saifasif */ public class ServiceCache { private final Map serviceCache; public ServiceCache() { serviceCache = new HashMap(); } /** * Get the service from the cache. null if no service is found matching the name * * @param serviceName a string * @return {@link Service} */ public Service getService(String serviceName) { Service cachedService = null; for (String serviceJndiName : serviceCache.keySet()) { if (serviceJndiName.equals(serviceName)) { cachedService = serviceCache.get(serviceJndiName); System.out.println("(cache call) Fetched service " + cachedService.getName() + "(" + cachedService.getId() + ") from cache... !"); } } return cachedService; } /** * Adds the service into the cache map * * @param newService a {@link Service} */ public void addService(Service newService) { serviceCache.put(newService.getName(), newService); } } ServiceImpl.java000066400000000000000000000016511264154357600337640ustar00rootroot00000000000000java-design-patterns-1.9.0/service-locator/src/main/java/com/iluwatar/servicelocatorpackage com.iluwatar.servicelocator; /** * This is a single service implementation of a sample service. This is the actual service that will * process the request. The reference for this service is to be looked upon in the JNDI server that * can be set in the web.xml deployment descriptor * * @author saifasif */ public class ServiceImpl implements Service { private final String serviceName; private final int id; /** * Constructor */ public ServiceImpl(String serviceName) { // set the service name this.serviceName = serviceName; // Generate a random id to this service object this.id = (int) Math.floor(Math.random() * 1000) + 1; } @Override public String getName() { return serviceName; } @Override public int getId() { return id; } @Override public void execute() { System.out.println("Service " + getName() + " is now executing with id " + getId()); } } ServiceLocator.java000066400000000000000000000023141264154357600344630ustar00rootroot00000000000000java-design-patterns-1.9.0/service-locator/src/main/java/com/iluwatar/servicelocatorpackage com.iluwatar.servicelocator; /** * The service locator module. Will fetch service from cache, otherwise creates a fresh service and * update cache * * @author saifasif */ public class ServiceLocator { private static ServiceCache serviceCache = new ServiceCache(); private ServiceLocator() { } /** * Fetch the service with the name param from the cache first, if no service is found, lookup the * service from the {@link InitContext} and then add the newly created service into the cache map * for future requests. * * @param serviceJndiName a string * @return {@link Service} */ public static Service getService(String serviceJndiName) { Service serviceObj = serviceCache.getService(serviceJndiName); if (serviceObj != null) { return serviceObj; } else { /* * If we are unable to retrive anything from cache, then lookup the service and add it in the * cache map */ InitContext ctx = new InitContext(); serviceObj = (Service) ctx.lookup(serviceJndiName); if (serviceObj != null) { // Only cache a service if it actually exists serviceCache.addService(serviceObj); } return serviceObj; } } } java-design-patterns-1.9.0/service-locator/src/test/000077500000000000000000000000001264154357600224335ustar00rootroot00000000000000java-design-patterns-1.9.0/service-locator/src/test/java/000077500000000000000000000000001264154357600233545ustar00rootroot00000000000000java-design-patterns-1.9.0/service-locator/src/test/java/com/000077500000000000000000000000001264154357600241325ustar00rootroot00000000000000java-design-patterns-1.9.0/service-locator/src/test/java/com/iluwatar/000077500000000000000000000000001264154357600257625ustar00rootroot00000000000000java-design-patterns-1.9.0/service-locator/src/test/java/com/iluwatar/servicelocator/000077500000000000000000000000001264154357600310065ustar00rootroot00000000000000java-design-patterns-1.9.0/service-locator/src/test/java/com/iluwatar/servicelocator/AppTest.java000066400000000000000000000003121264154357600332250ustar00rootroot00000000000000package com.iluwatar.servicelocator; import org.junit.Test; /** * * Application test * */ public class AppTest { @Test public void test() { String[] args = {}; App.main(args); } } ServiceLocatorTest.java000066400000000000000000000024361264154357600353630ustar00rootroot00000000000000java-design-patterns-1.9.0/service-locator/src/test/java/com/iluwatar/servicelocatorpackage com.iluwatar.servicelocator; import org.junit.Test; import static org.junit.Assert.assertEquals; import static org.junit.Assert.assertNotNull; import static org.junit.Assert.assertNull; import static org.junit.Assert.assertSame; import static org.junit.Assert.assertTrue; /** * Date: 12/29/15 - 19:07 PM * * @author Jeroen Meulemeester */ public class ServiceLocatorTest { /** * Verify if we just receive 'null' when requesting a non-existing service */ @Test public void testGetNonExistentService() { assertNull(ServiceLocator.getService("fantastic/unicorn/service")); assertNull(ServiceLocator.getService("another/fantastic/unicorn/service")); } /** * Verify if we get the same cached instance when requesting the same service twice */ @Test public void testServiceCache() { final String[] serviceNames = new String[]{ "jndi/serviceA", "jndi/serviceB" }; for (final String serviceName : serviceNames) { final Service service = ServiceLocator.getService(serviceName); assertNotNull(service); assertEquals(serviceName, service.getName()); assertTrue(service.getId() > 0); // The id is generated randomly, but the minimum value is '1' assertSame(service, ServiceLocator.getService(serviceName)); } } }java-design-patterns-1.9.0/singleton/000077500000000000000000000000001264154357600175665ustar00rootroot00000000000000java-design-patterns-1.9.0/singleton/etc/000077500000000000000000000000001264154357600203415ustar00rootroot00000000000000java-design-patterns-1.9.0/singleton/etc/singleton.png000066400000000000000000000534241264154357600230610ustar00rootroot00000000000000PNG  IHDRșrVIDATxo%W}}!:G;!$1: l4\Mu"hƴ ͓=3{1ncozl0! 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    * One of the risks of this pattern is that bugs resulting from setting a singleton up in a * distributed environment can be tricky to debug, since it will work fine if you debug with a * single classloader. Additionally, these problems can crop up a while after the implementation of * a singleton, since they may start out synchronous and only become async with time, so you it may * not be clear why you are seeing certain changes in behaviour. *

    * There are many ways to implement the Singleton. The first one is the eagerly initialized instance * in {@link IvoryTower}. Eager initialization implies that the implementation is thread safe. If * you can afford giving up control of the instantiation moment, then this implementation will suit * you fine. *

    * The other option to implement eagerly initialized Singleton is enum based Singleton. The example * is found in {@link EnumIvoryTower}. At first glance the code looks short and simple. However, you * should be aware of the downsides including committing to implementation strategy, extending the * enum class, serializability and restrictions to coding. These are extensively discussed in Stack * Overflow: * http://programmers.stackexchange.com/questions/179386/what-are-the-downsides-of-implementing * -a-singleton-with-javas-enum *

    * {@link ThreadSafeLazyLoadedIvoryTower} is a Singleton implementation that is initialized on * demand. The downside is that it is very slow to access since the whole access method is * synchronized. *

    * Another Singleton implementation that is initialized on demand is found in * {@link ThreadSafeDoubleCheckLocking}. It is somewhat faster than * {@link ThreadSafeLazyLoadedIvoryTower} since it doesn't synchronize the whole access method but * only the method internals on specific conditions. *

    * Yet another way to implement thread safe lazily initialized Singleton can be found in * {@link InitializingOnDemandHolderIdiom}. However, this implementation requires at least Java 8 * API level to work. */ public class App { /** * Program entry point. * * @param args command line args */ public static void main(String[] args) { // eagerly initialized singleton IvoryTower ivoryTower1 = IvoryTower.getInstance(); IvoryTower ivoryTower2 = IvoryTower.getInstance(); System.out.println("ivoryTower1=" + ivoryTower1); System.out.println("ivoryTower2=" + ivoryTower2); // lazily initialized singleton ThreadSafeLazyLoadedIvoryTower threadSafeIvoryTower1 = ThreadSafeLazyLoadedIvoryTower.getInstance(); ThreadSafeLazyLoadedIvoryTower threadSafeIvoryTower2 = ThreadSafeLazyLoadedIvoryTower.getInstance(); System.out.println("threadSafeIvoryTower1=" + threadSafeIvoryTower1); System.out.println("threadSafeIvoryTower2=" + threadSafeIvoryTower2); // enum singleton EnumIvoryTower enumIvoryTower1 = EnumIvoryTower.INSTANCE; EnumIvoryTower enumIvoryTower2 = EnumIvoryTower.INSTANCE; System.out.println("enumIvoryTower1=" + enumIvoryTower1); System.out.println("enumIvoryTower2=" + enumIvoryTower2); // double checked locking ThreadSafeDoubleCheckLocking dcl1 = ThreadSafeDoubleCheckLocking.getInstance(); System.out.println(dcl1); ThreadSafeDoubleCheckLocking dcl2 = ThreadSafeDoubleCheckLocking.getInstance(); System.out.println(dcl2); // initialize on demand holder idiom InitializingOnDemandHolderIdiom demandHolderIdiom = InitializingOnDemandHolderIdiom.getInstance(); System.out.println(demandHolderIdiom); InitializingOnDemandHolderIdiom demandHolderIdiom2 = InitializingOnDemandHolderIdiom.getInstance(); System.out.println(demandHolderIdiom2); } } java-design-patterns-1.9.0/singleton/src/main/java/com/iluwatar/singleton/EnumIvoryTower.java000066400000000000000000000004411264154357600324520ustar00rootroot00000000000000package com.iluwatar.singleton; /** * Enum based singleton implementation. Effective Java 2nd Edition (Joshua Bloch) p. 18 */ public enum EnumIvoryTower { INSTANCE; @Override public String toString() { return getDeclaringClass().getCanonicalName() + "@" + hashCode(); } } InitializingOnDemandHolderIdiom.java000066400000000000000000000017601264154357600356020ustar00rootroot00000000000000java-design-patterns-1.9.0/singleton/src/main/java/com/iluwatar/singletonpackage com.iluwatar.singleton; import java.io.Serializable; /** * The Initialize-on-demand-holder idiom is a secure way of creating lazy initialized singleton * object in Java. refer to "The CERT Oracle Secure Coding Standard for Java" By Dhruv Mohindra, * Robert C. Seacord p.378 *

    * Singleton objects usually are heavy to create and sometimes need to serialize them. This class * also shows how to preserve singleton in serialized version of singleton. * * @author mortezaadi@gmail.com */ public class InitializingOnDemandHolderIdiom implements Serializable { private static final long serialVersionUID = 1L; private InitializingOnDemandHolderIdiom() {} public static InitializingOnDemandHolderIdiom getInstance() { return HelperHolder.INSTANCE; } protected Object readResolve() { return getInstance(); } private static class HelperHolder { public static final InitializingOnDemandHolderIdiom INSTANCE = new InitializingOnDemandHolderIdiom(); } } java-design-patterns-1.9.0/singleton/src/main/java/com/iluwatar/singleton/IvoryTower.java000066400000000000000000000011151264154357600316240ustar00rootroot00000000000000package com.iluwatar.singleton; /** * Singleton class. Eagerly initialized static instance guarantees thread safety. */ public final class IvoryTower { /** * Static to class instance of the class. */ private static final IvoryTower INSTANCE = new IvoryTower(); /** * Private constructor so nobody can instantiate the class. */ private IvoryTower() {} /** * To be called by user to obtain instance of the class. * * @return instance of the singleton. */ public static IvoryTower getInstance() { return INSTANCE; } } ThreadSafeDoubleCheckLocking.java000066400000000000000000000022201264154357600350200ustar00rootroot00000000000000java-design-patterns-1.9.0/singleton/src/main/java/com/iluwatar/singletonpackage com.iluwatar.singleton; /** * Double check locking *

    * http://www.cs.umd.edu/~pugh/java/memoryModel/DoubleCheckedLocking.html *

    * Broken under Java 1.4. * * @author mortezaadi@gmail.com */ public class ThreadSafeDoubleCheckLocking { private static volatile ThreadSafeDoubleCheckLocking instance; /** * private constructor to prevent client from instantiating. */ private ThreadSafeDoubleCheckLocking() { // to prevent instantiating by Reflection call if (instance != null) { throw new IllegalStateException("Already initialized."); } } /** * Public accessor. * * @return an instance of the class. */ public static ThreadSafeDoubleCheckLocking getInstance() { // local variable increases performance by 25 percent // Joshua Bloch "Effective Java, Second Edition", p. 283-284 ThreadSafeDoubleCheckLocking result = instance; if (result == null) { synchronized (ThreadSafeDoubleCheckLocking.class) { result = instance; if (result == null) { instance = result = new ThreadSafeDoubleCheckLocking(); } } } return result; } } ThreadSafeLazyLoadedIvoryTower.java000066400000000000000000000013251264154357600354500ustar00rootroot00000000000000java-design-patterns-1.9.0/singleton/src/main/java/com/iluwatar/singletonpackage com.iluwatar.singleton; /** * Thread-safe Singleton class. The instance is lazily initialized and thus needs synchronization * mechanism. * * Note: if created by reflection then a singleton will not be created but multiple options in the * same classloader */ public class ThreadSafeLazyLoadedIvoryTower { private static ThreadSafeLazyLoadedIvoryTower instance = null; private ThreadSafeLazyLoadedIvoryTower() {} /** * The instance gets created only when it is called for first time. Lazy-loading */ public static synchronized ThreadSafeLazyLoadedIvoryTower getInstance() { if (instance == null) { instance = new ThreadSafeLazyLoadedIvoryTower(); } return instance; } } java-design-patterns-1.9.0/singleton/src/test/000077500000000000000000000000001264154357600213345ustar00rootroot00000000000000java-design-patterns-1.9.0/singleton/src/test/java/000077500000000000000000000000001264154357600222555ustar00rootroot00000000000000java-design-patterns-1.9.0/singleton/src/test/java/com/000077500000000000000000000000001264154357600230335ustar00rootroot00000000000000java-design-patterns-1.9.0/singleton/src/test/java/com/iluwatar/000077500000000000000000000000001264154357600246635ustar00rootroot00000000000000java-design-patterns-1.9.0/singleton/src/test/java/com/iluwatar/singleton/000077500000000000000000000000001264154357600266655ustar00rootroot00000000000000java-design-patterns-1.9.0/singleton/src/test/java/com/iluwatar/singleton/AppTest.java000066400000000000000000000003051264154357600311060ustar00rootroot00000000000000package com.iluwatar.singleton; import org.junit.Test; /** * * Application test * */ public class AppTest { @Test public void test() { String[] args = {}; App.main(args); } } java-design-patterns-1.9.0/singleton/src/test/java/com/iluwatar/singleton/EnumIvoryTowerTest.java000066400000000000000000000005351264154357600333510ustar00rootroot00000000000000package com.iluwatar.singleton; /** * Date: 12/29/15 - 19:20 PM * * @author Jeroen Meulemeester */ public class EnumIvoryTowerTest extends SingletonTest { /** * Create a new singleton test instance using the given 'getInstance' method */ public EnumIvoryTowerTest() { super(() -> EnumIvoryTower.INSTANCE); } } InitializingOnDemandHolderIdiomTest.java000066400000000000000000000006361264154357600364760ustar00rootroot00000000000000java-design-patterns-1.9.0/singleton/src/test/java/com/iluwatar/singletonpackage com.iluwatar.singleton; /** * Date: 12/29/15 - 19:22 PM * * @author Jeroen Meulemeester */ public class InitializingOnDemandHolderIdiomTest extends SingletonTest { /** * Create a new singleton test instance using the given 'getInstance' method */ public InitializingOnDemandHolderIdiomTest() { super(InitializingOnDemandHolderIdiom::getInstance); } }java-design-patterns-1.9.0/singleton/src/test/java/com/iluwatar/singleton/IvoryTowerTest.java000066400000000000000000000005121264154357600325170ustar00rootroot00000000000000package com.iluwatar.singleton; /** * Date: 12/29/15 - 19:23 PM * * @author Jeroen Meulemeester */ public class IvoryTowerTest extends SingletonTest { /** * Create a new singleton test instance using the given 'getInstance' method */ public IvoryTowerTest() { super(IvoryTower::getInstance); } }java-design-patterns-1.9.0/singleton/src/test/java/com/iluwatar/singleton/SingletonTest.java000066400000000000000000000052641264154357600323410ustar00rootroot00000000000000package com.iluwatar.singleton; import org.junit.Test; import java.util.ArrayList; import java.util.List; import java.util.concurrent.Callable; import java.util.concurrent.ExecutorService; import java.util.concurrent.Executors; import java.util.concurrent.Future; import java.util.function.Supplier; import static org.junit.Assert.assertNotNull; import static org.junit.Assert.assertSame; /** * This class provides several test case that test singleton construction. * * The first proves that multiple calls to the singleton getInstance object are the same when called * in the SAME thread. The second proves that multiple calls to the singleton getInstance object are * the same when called in the DIFFERENT thread. * * Date: 12/29/15 - 19:25 PM * * @author Jeroen Meulemeester * @author Richard Jones */ public abstract class SingletonTest { /** * The singleton's getInstance method */ private final Supplier singletonInstanceMethod; /** * Create a new singleton test instance using the given 'getInstance' method * * @param singletonInstanceMethod The singleton's getInstance method */ public SingletonTest(final Supplier singletonInstanceMethod) { this.singletonInstanceMethod = singletonInstanceMethod; } /** * Test the singleton in a non-concurrent setting */ @Test public void testMultipleCallsReturnTheSameObjectInSameThread() { // Create several instances in the same calling thread S instance1 = this.singletonInstanceMethod.get(); S instance2 = this.singletonInstanceMethod.get(); S instance3 = this.singletonInstanceMethod.get(); // now check they are equal assertSame(instance1, instance2); assertSame(instance1, instance3); assertSame(instance2, instance3); } /** * Test singleton instance in a concurrent setting */ @Test(timeout = 10000) public void testMultipleCallsReturnTheSameObjectInDifferentThreads() throws Exception { // Create 10000 tasks and inside each callable instantiate the singleton class final List> tasks = new ArrayList<>(); for (int i = 0; i < 10000; i++) { tasks.add(this.singletonInstanceMethod::get); } // Use up to 8 concurrent threads to handle the tasks final ExecutorService executorService = Executors.newFixedThreadPool(8); final List> results = executorService.invokeAll(tasks); // wait for all of the threads to complete final S expectedInstance = this.singletonInstanceMethod.get(); for (Future res : results) { final S instance = res.get(); assertNotNull(instance); assertSame(expectedInstance, instance); } // tidy up the executor executorService.shutdown(); } } ThreadSafeDoubleCheckLockingTest.java000066400000000000000000000006221264154357600357170ustar00rootroot00000000000000java-design-patterns-1.9.0/singleton/src/test/java/com/iluwatar/singletonpackage com.iluwatar.singleton; /** * Date: 12/29/15 - 19:26 PM * * @author Jeroen Meulemeester */ public class ThreadSafeDoubleCheckLockingTest extends SingletonTest { /** * Create a new singleton test instance using the given 'getInstance' method */ public ThreadSafeDoubleCheckLockingTest() { super(ThreadSafeDoubleCheckLocking::getInstance); } }ThreadSafeLazyLoadedIvoryTowerTest.java000066400000000000000000000006331264154357600363440ustar00rootroot00000000000000java-design-patterns-1.9.0/singleton/src/test/java/com/iluwatar/singletonpackage com.iluwatar.singleton; /** * Date: 12/29/15 - 19:26 PM * * @author Jeroen Meulemeester */ public class ThreadSafeLazyLoadedIvoryTowerTest extends SingletonTest { /** * Create a new singleton test instance using the given 'getInstance' method */ public ThreadSafeLazyLoadedIvoryTowerTest() { super(ThreadSafeLazyLoadedIvoryTower::getInstance); } } java-design-patterns-1.9.0/specification/000077500000000000000000000000001264154357600204045ustar00rootroot00000000000000java-design-patterns-1.9.0/specification/etc/000077500000000000000000000000001264154357600211575ustar00rootroot00000000000000java-design-patterns-1.9.0/specification/etc/specification.png000066400000000000000000001404211264154357600245070ustar00rootroot00000000000000PNG  IHDR@~IDATx{}&ڰ`$f /`9Le4p8ȱ[2HC8x(Wè)1ДT$W3eC9zE~h($t b7@`Ou=OU}>4Ow~;>8V&@, `|]-嵲;`@ XpC@H.a KlA?``Q{Ț̙]kCE$Ca;a@ ̑LE$Ca;a@ ̑LE$Ca;a@ ̑LE$Ca;a@ ̑LEd:9̔X;6/-{yp{ꄺ X:X0Da -+"k vm~Ju+\\Y^ `HEF!,cB(,sEd58(j;3.;-;({/&0VQItkKa@PQ uja &;QXdJU\mllA%1>BDZu\XTN*-.2"`B}JUժh9E@kUY_̇X}Ai5]ۉ+`a&@(U)s3*žGEܢxpE,L.]CPo0"Na;a@PS tDa -PD`1D   Da -PD`1D   Da -PD`1D   Da -PD`1D   Da -PD2۽S)Ju+*D3P'@s$&%@hfw>=:}̓SQk۽=/Q=u,0GBj2QXd^xf{|v?~AX`ND [_o?~>+mSU9B3P'+`ɝf< F,aYDa -\k1}/<+pw׿M|jUmo,{o_[yao+lQ)w'>O\qO{O/~e Lܽ,+fa@Ñ4{h?rL=ïd {l ;{KFh~Gټ KlT1o5*ׅET,:?fc%ٖoD wן[+_=cl#% Þ:!/Kiv 򁲞|TTa]\;Q5Q Q0F1B;E4PXd wZ'׾׿{s=›_G} ,lE-JU0?+#A:ؓ];9[hQw?qŋ?Y_|>7K\ B毰iq "`:^ϯɉw3k!lfG +|7VMQʗQ4KF4(&h(,Dh ʶD h1[|iM?{>CSâ+yC:ŏ1i#7(a?E+=Go[c,߂%[3x&#lc#?Ks7u﮽vQW=}f[^r ÝvaB1߰{E2t҅SЯx }0=*½2+XJO1RWE.`ڿ^, [n,$Nj]mwhwļ>J./y <Vȏ@0zmP{o\yo]iwwHpՠ& r_*~ %] lrmaP)hВϨ>"I~/?Bs5-LZnw^~&kO_mO{3IUL=W-% Ĉ-3P'"`:K|GJia u$=І/Ba̋ک[z H{R~Z/pGs><]m<kD#4#e7@䁬Xi"?TF_Km޷0E|ϟ}a[?xhP+M Gُ(L!;4L/%<!Ya`0D.ֈfmx@ {~,;X$ w6]pOS)lWW)ʐQM.D=w[=6PX: };X]"?Οx{ǏA{Mw~yΘĚ>_]Tht.s(iά:atFU﩮K˟Ɍt> G;Ϋ|_ˋDF`IzԊ4%sb %5JYT|z? fjOQI<<"\j`XA{d.DE!e2+;LsyG*K]Vdž@䁬Xi"?o|gK?mGwүX8P.=|v E~pRAb.cFwF͐+J3 cݵaCgZ;l?yD_{rOwm1 `EӌR noPdJVxR3[ 4T5x6[ψy }2gd2+;Ls}GXT\j >S`X4-;>OS'mѝW61䑃2:zztE.0%7OP6 b]種~wqgT V44t(V8~7z#wQ !:* R~'y!UG4c,/w:۹|)w0|TX'e%f,NaHVbTB]mwskZG4*nh|&D~yrk7-޶ ;IM{JSJ3(+Dˡq-|CQĦW!TK+y_$^b J${9W3؂ϴ;~G`+Y{`{O2  B.VN3vPwSq£ Y2=%%V')ڏ>V Z X#)bɏQj-nLchӮGs|;k>rmϏuw3Ԍ3Z\%M3, d3k/IeJ:t!}E%t%dGm8WiSha}{{6}6ԫ!*XV/./TE y XfRwSPG'`in0y*wp\mw6B;M LNh >S6LQ5sVffՅQSts&c=Plv> [O>+K3J}Fv` {~N3,]# KGPTS'j: (j!/+mt̔>MG2jO8}2B##?AϴB=uBp `e#=OI -_i? 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As well as its usefulness in selection, it is also valuable for validation and for building to order ![alt text](./etc/specification.png "Specification") **Applicability:** Use the Specification pattern when * you need to select a subset of objects based on some criteria, and to refresh the selection at various times * you need to check that only suitable objects are used for a certain role (validation) **Credits:** * [Martin Fowler - Specifications](http://martinfowler.com/apsupp/spec.pdf) java-design-patterns-1.9.0/specification/pom.xml000066400000000000000000000013741264154357600217260ustar00rootroot00000000000000 4.0.0 com.iluwatar java-design-patterns 1.9.0 specification junit junit test org.mockito mockito-core test java-design-patterns-1.9.0/specification/src/000077500000000000000000000000001264154357600211735ustar00rootroot00000000000000java-design-patterns-1.9.0/specification/src/main/000077500000000000000000000000001264154357600221175ustar00rootroot00000000000000java-design-patterns-1.9.0/specification/src/main/java/000077500000000000000000000000001264154357600230405ustar00rootroot00000000000000java-design-patterns-1.9.0/specification/src/main/java/com/000077500000000000000000000000001264154357600236165ustar00rootroot00000000000000java-design-patterns-1.9.0/specification/src/main/java/com/iluwatar/000077500000000000000000000000001264154357600254465ustar00rootroot00000000000000java-design-patterns-1.9.0/specification/src/main/java/com/iluwatar/specification/000077500000000000000000000000001264154357600302665ustar00rootroot00000000000000java-design-patterns-1.9.0/specification/src/main/java/com/iluwatar/specification/app/000077500000000000000000000000001264154357600310465ustar00rootroot00000000000000java-design-patterns-1.9.0/specification/src/main/java/com/iluwatar/specification/app/App.java000066400000000000000000000047521264154357600324410ustar00rootroot00000000000000package com.iluwatar.specification.app; import java.util.Arrays; import java.util.List; import java.util.stream.Collectors; import com.iluwatar.specification.creature.Creature; import com.iluwatar.specification.creature.Dragon; import com.iluwatar.specification.creature.Goblin; import com.iluwatar.specification.creature.KillerBee; import com.iluwatar.specification.creature.Octopus; import com.iluwatar.specification.creature.Shark; import com.iluwatar.specification.creature.Troll; import com.iluwatar.specification.property.Color; import com.iluwatar.specification.property.Movement; import com.iluwatar.specification.selector.ColorSelector; import com.iluwatar.specification.selector.MovementSelector; /** * * The central idea of the Specification pattern is to separate the statement of how to match a * candidate, from the candidate object that it is matched against. As well as its usefulness in * selection, it is also valuable for validation and for building to order. *

    * In this example we have a pool of creatures with different properties. We then have defined * separate selection rules (Specifications) that we apply to the collection and as output receive * only the creatures that match the selection criteria. *

    * http://martinfowler.com/apsupp/spec.pdf * */ public class App { /** * Program entry point */ public static void main(String[] args) { // initialize creatures list List creatures = Arrays.asList(new Goblin(), new Octopus(), new Dragon(), new Shark(), new Troll(), new KillerBee()); // find all walking creatures System.out.println("Find all walking creatures"); List walkingCreatures = creatures.stream().filter(new MovementSelector(Movement.WALKING)) .collect(Collectors.toList()); walkingCreatures.stream().forEach(System.out::println); // find all dark creatures System.out.println("Find all dark creatures"); List darkCreatures = creatures.stream().filter(new ColorSelector(Color.DARK)).collect(Collectors.toList()); darkCreatures.stream().forEach(System.out::println); // find all red and flying creatures System.out.println("Find all red and flying creatures"); List redAndFlyingCreatures = creatures.stream() .filter(new ColorSelector(Color.RED).and(new MovementSelector(Movement.FLYING))) .collect(Collectors.toList()); redAndFlyingCreatures.stream().forEach(System.out::println); } } java-design-patterns-1.9.0/specification/src/main/java/com/iluwatar/specification/creature/000077500000000000000000000000001264154357600321005ustar00rootroot00000000000000AbstractCreature.java000066400000000000000000000020011264154357600361130ustar00rootroot00000000000000java-design-patterns-1.9.0/specification/src/main/java/com/iluwatar/specification/creaturepackage com.iluwatar.specification.creature; import com.iluwatar.specification.property.Color; import com.iluwatar.specification.property.Movement; import com.iluwatar.specification.property.Size; /** * * Base class for concrete creatures. * */ public abstract class AbstractCreature implements Creature { private String name; private Size size; private Movement movement; private Color color; /** * Constructor */ public AbstractCreature(String name, Size size, Movement movement, Color color) { this.name = name; this.size = size; this.movement = movement; this.color = color; } @Override public String toString() { return String.format("%s [size=%s, movement=%s, color=%s]", name, size, movement, color); } @Override public String getName() { return name; } @Override public Size getSize() { return size; } @Override public Movement getMovement() { return movement; } @Override public Color getColor() { return color; } } Creature.java000066400000000000000000000005431264154357600344400ustar00rootroot00000000000000java-design-patterns-1.9.0/specification/src/main/java/com/iluwatar/specification/creaturepackage com.iluwatar.specification.creature; import com.iluwatar.specification.property.Color; import com.iluwatar.specification.property.Movement; import com.iluwatar.specification.property.Size; /** * * Creature interface. * */ public interface Creature { String getName(); Size getSize(); Movement getMovement(); Color getColor(); } Dragon.java000066400000000000000000000005611264154357600341000ustar00rootroot00000000000000java-design-patterns-1.9.0/specification/src/main/java/com/iluwatar/specification/creaturepackage com.iluwatar.specification.creature; import com.iluwatar.specification.property.Color; import com.iluwatar.specification.property.Movement; import com.iluwatar.specification.property.Size; /** * * Dragon creature. * */ public class Dragon extends AbstractCreature { public Dragon() { super("Dragon", Size.LARGE, Movement.FLYING, Color.RED); } } Goblin.java000066400000000000000000000005641264154357600341030ustar00rootroot00000000000000java-design-patterns-1.9.0/specification/src/main/java/com/iluwatar/specification/creaturepackage com.iluwatar.specification.creature; import com.iluwatar.specification.property.Color; import com.iluwatar.specification.property.Movement; import com.iluwatar.specification.property.Size; /** * * Goblin creature. * */ public class Goblin extends AbstractCreature { public Goblin() { super("Goblin", Size.SMALL, Movement.WALKING, Color.GREEN); } } KillerBee.java000066400000000000000000000005771264154357600345330ustar00rootroot00000000000000java-design-patterns-1.9.0/specification/src/main/java/com/iluwatar/specification/creaturepackage com.iluwatar.specification.creature; import com.iluwatar.specification.property.Color; import com.iluwatar.specification.property.Movement; import com.iluwatar.specification.property.Size; /** * * KillerBee creature. * */ public class KillerBee extends AbstractCreature { public KillerBee() { super("KillerBee", Size.SMALL, Movement.FLYING, Color.LIGHT); } } Octopus.java000066400000000000000000000005711264154357600343230ustar00rootroot00000000000000java-design-patterns-1.9.0/specification/src/main/java/com/iluwatar/specification/creaturepackage com.iluwatar.specification.creature; import com.iluwatar.specification.property.Color; import com.iluwatar.specification.property.Movement; import com.iluwatar.specification.property.Size; /** * * Octopus creature. * */ public class Octopus extends AbstractCreature { public Octopus() { super("Octopus", Size.NORMAL, Movement.SWIMMING, Color.DARK); } } Shark.java000066400000000000000000000005621264154357600337370ustar00rootroot00000000000000java-design-patterns-1.9.0/specification/src/main/java/com/iluwatar/specification/creaturepackage com.iluwatar.specification.creature; import com.iluwatar.specification.property.Color; import com.iluwatar.specification.property.Movement; import com.iluwatar.specification.property.Size; /** * * Shark creature. * */ public class Shark extends AbstractCreature { public Shark() { super("Shark", Size.NORMAL, Movement.SWIMMING, Color.LIGHT); } } Troll.java000066400000000000000000000005571264154357600337670ustar00rootroot00000000000000java-design-patterns-1.9.0/specification/src/main/java/com/iluwatar/specification/creaturepackage com.iluwatar.specification.creature; import com.iluwatar.specification.property.Color; import com.iluwatar.specification.property.Movement; import com.iluwatar.specification.property.Size; /** * * Troll creature. * */ public class Troll extends AbstractCreature { public Troll() { super("Troll", Size.LARGE, Movement.WALKING, Color.DARK); } } java-design-patterns-1.9.0/specification/src/main/java/com/iluwatar/specification/property/000077500000000000000000000000001264154357600321525ustar00rootroot00000000000000Color.java000066400000000000000000000004611264154357600340150ustar00rootroot00000000000000java-design-patterns-1.9.0/specification/src/main/java/com/iluwatar/specification/propertypackage com.iluwatar.specification.property; /** * * Color property. * */ public enum Color { DARK("dark"), LIGHT("light"), GREEN("green"), RED("red"); private String title; Color(String title) { this.title = title; } @Override public String toString() { return title; } } Movement.java000066400000000000000000000004741264154357600345350ustar00rootroot00000000000000java-design-patterns-1.9.0/specification/src/main/java/com/iluwatar/specification/propertypackage com.iluwatar.specification.property; /** * * Movement property. * */ public enum Movement { WALKING("walking"), SWIMMING("swimming"), FLYING("flying"); private String title; Movement(String title) { this.title = title; } @Override public String toString() { return title; } } java-design-patterns-1.9.0/specification/src/main/java/com/iluwatar/specification/property/Size.java000066400000000000000000000004451264154357600337320ustar00rootroot00000000000000package com.iluwatar.specification.property; /** * * Size property. * */ public enum Size { SMALL("small"), NORMAL("normal"), LARGE("large"); private String title; Size(String title) { this.title = title; } @Override public String toString() { return title; } } java-design-patterns-1.9.0/specification/src/main/java/com/iluwatar/specification/selector/000077500000000000000000000000001264154357600321065ustar00rootroot00000000000000ColorSelector.java000066400000000000000000000007051264154357600354530ustar00rootroot00000000000000java-design-patterns-1.9.0/specification/src/main/java/com/iluwatar/specification/selectorpackage com.iluwatar.specification.selector; import java.util.function.Predicate; import com.iluwatar.specification.creature.Creature; import com.iluwatar.specification.property.Color; /** * * Color selector. * */ public class ColorSelector implements Predicate { private final Color c; public ColorSelector(Color c) { this.c = c; } @Override public boolean test(Creature t) { return t.getColor().equals(c); } } MovementSelector.java000066400000000000000000000007321264154357600361670ustar00rootroot00000000000000java-design-patterns-1.9.0/specification/src/main/java/com/iluwatar/specification/selectorpackage com.iluwatar.specification.selector; import java.util.function.Predicate; import com.iluwatar.specification.creature.Creature; import com.iluwatar.specification.property.Movement; /** * * Movement selector. * */ public class MovementSelector implements Predicate { private final Movement m; public MovementSelector(Movement m) { this.m = m; } @Override public boolean test(Creature t) { return t.getMovement().equals(m); } } SizeSelector.java000066400000000000000000000006761264154357600353160ustar00rootroot00000000000000java-design-patterns-1.9.0/specification/src/main/java/com/iluwatar/specification/selectorpackage com.iluwatar.specification.selector; import java.util.function.Predicate; import com.iluwatar.specification.creature.Creature; import com.iluwatar.specification.property.Size; /** * * Size selector. * */ public class SizeSelector implements Predicate { private final Size s; public SizeSelector(Size s) { this.s = s; } @Override public boolean test(Creature t) { return t.getSize().equals(s); } } java-design-patterns-1.9.0/specification/src/test/000077500000000000000000000000001264154357600221525ustar00rootroot00000000000000java-design-patterns-1.9.0/specification/src/test/java/000077500000000000000000000000001264154357600230735ustar00rootroot00000000000000java-design-patterns-1.9.0/specification/src/test/java/com/000077500000000000000000000000001264154357600236515ustar00rootroot00000000000000java-design-patterns-1.9.0/specification/src/test/java/com/iluwatar/000077500000000000000000000000001264154357600255015ustar00rootroot00000000000000java-design-patterns-1.9.0/specification/src/test/java/com/iluwatar/specification/000077500000000000000000000000001264154357600303215ustar00rootroot00000000000000java-design-patterns-1.9.0/specification/src/test/java/com/iluwatar/specification/app/000077500000000000000000000000001264154357600311015ustar00rootroot00000000000000java-design-patterns-1.9.0/specification/src/test/java/com/iluwatar/specification/app/AppTest.java000066400000000000000000000003151264154357600333230ustar00rootroot00000000000000package com.iluwatar.specification.app; import org.junit.Test; /** * * Application test * */ public class AppTest { @Test public void test() { String[] args = {}; App.main(args); } } java-design-patterns-1.9.0/specification/src/test/java/com/iluwatar/specification/creature/000077500000000000000000000000001264154357600321335ustar00rootroot00000000000000CreatureTest.java000066400000000000000000000061471264154357600353410ustar00rootroot00000000000000java-design-patterns-1.9.0/specification/src/test/java/com/iluwatar/specification/creaturepackage com.iluwatar.specification.creature; import com.iluwatar.specification.property.Color; import com.iluwatar.specification.property.Movement; import com.iluwatar.specification.property.Size; import org.junit.Test; import org.junit.runner.RunWith; import org.junit.runners.Parameterized; import java.util.Arrays; import java.util.Collection; import static org.junit.Assert.assertEquals; import static org.junit.Assert.assertNotNull; /** * Date: 12/29/15 - 7:47 PM * * @author Jeroen Meulemeester */ @RunWith(Parameterized.class) public class CreatureTest { /** * @return The tested {@link Creature} instance and its expected specs */ @Parameterized.Parameters public static Collection data() { return Arrays.asList( new Object[]{new Dragon(), "Dragon", Size.LARGE, Movement.FLYING, Color.RED}, new Object[]{new Goblin(), "Goblin", Size.SMALL, Movement.WALKING, Color.GREEN}, new Object[]{new KillerBee(), "KillerBee", Size.SMALL, Movement.FLYING, Color.LIGHT}, new Object[]{new Octopus(), "Octopus", Size.NORMAL, Movement.SWIMMING, Color.DARK}, new Object[]{new Shark(), "Shark", Size.NORMAL, Movement.SWIMMING, Color.LIGHT}, new Object[]{new Troll(), "Troll", Size.LARGE, Movement.WALKING, Color.DARK} ); } /** * The tested creature */ private final Creature testedCreature; /** * The expected name of the tested creature */ private final String name; /** * The expected size of the tested creature */ private final Size size; /** * The expected movement type of the tested creature */ private final Movement movement; /** * The expected color of the tested creature */ private final Color color; /** * @param testedCreature The tested creature * @param name The expected name of the creature * @param size The expected size of the creature * @param movement The expected movement type of the creature * @param color The expected color of the creature */ public CreatureTest(final Creature testedCreature, final String name, final Size size, final Movement movement, final Color color) { this.testedCreature = testedCreature; this.name = name; this.size = size; this.movement = movement; this.color = color; } @Test public void testGetName() throws Exception { assertEquals(this.name, this.testedCreature.getName()); } @Test public void testGetSize() throws Exception { assertEquals(this.size, this.testedCreature.getSize()); } @Test public void testGetMovement() throws Exception { assertEquals(this.movement, this.testedCreature.getMovement()); } @Test public void testGetColor() throws Exception { assertEquals(this.color, this.testedCreature.getColor()); } @Test public void testToString() throws Exception { final String toString = this.testedCreature.toString(); assertNotNull(toString); assertEquals( String.format("%s [size=%s, movement=%s, color=%s]", name, size, movement, color), toString ); } }java-design-patterns-1.9.0/specification/src/test/java/com/iluwatar/specification/selector/000077500000000000000000000000001264154357600321415ustar00rootroot00000000000000ColorSelectorTest.java000066400000000000000000000017041264154357600363460ustar00rootroot00000000000000java-design-patterns-1.9.0/specification/src/test/java/com/iluwatar/specification/selectorpackage com.iluwatar.specification.selector; import com.iluwatar.specification.creature.Creature; import com.iluwatar.specification.property.Color; import org.junit.Test; import static org.junit.Assert.assertFalse; import static org.junit.Assert.assertTrue; import static org.mockito.Mockito.mock; import static org.mockito.Mockito.when; /** * Date: 12/29/15 - 7:35 PM * * @author Jeroen Meulemeester */ public class ColorSelectorTest { /** * Verify if the color selector gives the correct results */ @Test public void testColor() { final Creature greenCreature = mock(Creature.class); when(greenCreature.getColor()).thenReturn(Color.GREEN); final Creature redCreature = mock(Creature.class); when(redCreature.getColor()).thenReturn(Color.RED); final ColorSelector greenSelector = new ColorSelector(Color.GREEN); assertTrue(greenSelector.test(greenCreature)); assertFalse(greenSelector.test(redCreature)); } }MovementSelectorTest.java000066400000000000000000000020731264154357600370620ustar00rootroot00000000000000java-design-patterns-1.9.0/specification/src/test/java/com/iluwatar/specification/selectorpackage com.iluwatar.specification.selector; import com.iluwatar.specification.creature.Creature; import com.iluwatar.specification.property.Color; import com.iluwatar.specification.property.Movement; import org.junit.Test; import static org.junit.Assert.assertFalse; import static org.junit.Assert.assertTrue; import static org.mockito.Mockito.mock; import static org.mockito.Mockito.when; /** * Date: 12/29/15 - 7:37 PM * * @author Jeroen Meulemeester */ public class MovementSelectorTest { /** * Verify if the movement selector gives the correct results */ @Test public void testMovement() { final Creature swimmingCreature = mock(Creature.class); when(swimmingCreature.getMovement()).thenReturn(Movement.SWIMMING); final Creature flyingCreature = mock(Creature.class); when(flyingCreature.getMovement()).thenReturn(Movement.FLYING); final MovementSelector swimmingSelector = new MovementSelector(Movement.SWIMMING); assertTrue(swimmingSelector.test(swimmingCreature)); assertFalse(swimmingSelector.test(flyingCreature)); } }SizeSelectorTest.java000066400000000000000000000017151264154357600362040ustar00rootroot00000000000000java-design-patterns-1.9.0/specification/src/test/java/com/iluwatar/specification/selectorpackage com.iluwatar.specification.selector; import com.iluwatar.specification.creature.Creature; import com.iluwatar.specification.property.Size; import org.junit.Test; import static org.junit.Assert.assertFalse; import static org.junit.Assert.assertTrue; import static org.mockito.Mockito.mock; import static org.mockito.Mockito.when; /** * Date: 12/29/15 - 7:43 PM * * @author Jeroen Meulemeester */ public class SizeSelectorTest { /** * Verify if the size selector gives the correct results */ @Test public void testMovement() { final Creature normalCreature = mock(Creature.class); when(normalCreature.getSize()).thenReturn(Size.NORMAL); final Creature smallCreature = mock(Creature.class); when(smallCreature.getSize()).thenReturn(Size.SMALL); final SizeSelector normalSelector = new SizeSelector(Size.NORMAL); assertTrue(normalSelector.test(normalCreature)); assertFalse(normalSelector.test(smallCreature)); } } java-design-patterns-1.9.0/state/000077500000000000000000000000001264154357600167045ustar00rootroot00000000000000java-design-patterns-1.9.0/state/etc/000077500000000000000000000000001264154357600174575ustar00rootroot00000000000000java-design-patterns-1.9.0/state/etc/state.png000066400000000000000000000425311264154357600213120ustar00rootroot00000000000000PNG  IHDRxSr& E IDATx}}peu:-CVqQx_3I֌<Y2X!80D3HyFx!# bWʩCJƅ-9MMHUVm}{~[}O:)F ' j@tJeX0'7?h2S h, h" h" h" h2]4R(m03RaiWZuJj X3KGȉ{ЬimYX}z+~zRm !tuPozt^1ݧ :sM'GVN!F*YH3)r7Q+uby]s%Krt|VLG[O_h`ff2!I38~~zkEw P"9])j:c ̌tRDFF]gs9OBGZW&_V`ff7GTuM9vsOmہ6OQUnJTEf'i\9U}F^] YdCI@?z[[e!Yx9{PUBȉ&Jivq1zk3 f.yt+WRi : ORmrI4C * * * * * * =Ѽʯ5~F8~]R>)7r.Dsٯ1˘]U,]ZgY.mo EFDۊ85z~l~%9vHI4>zez'Ov_}b/Rq2[hK}lh:cjNXhHͩ') lSKyg/~Mbͦ*G"ʳ]*4\li:cgN=Z#NGla Ɉ&ozKk_k|CϾ4٭`r'4\}{y6? u=BԢS|3aG}l/"ln7-w.ׂ~H43+L'q׿Q;b6"錑9hEs4qdS 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F<`0!$E`(`Ƀ\BQ$pb F<`0!$E`Q/H^uD.0 W`QN=}FreС=E.0 W`(Sx/^(,<9mA')iUۻ?oK\\)8jҏQ[b'23)NnO{{봴1c ҩ-IK˦ =:j;;#G(@`([|>i`\٪U>d$->xХLF6aITTPeDN8XhAQڵkE'O #POO Y&OSM!FQ]sg{ｭO(\O̞m[8y~Xo(ci11qe.]6|x/F)(HbFgݻlwCB>&Cddcܸ66FQ]E}h 0}%!!dΝfܹe9뗔&2 M4‹)S<_™QzTZܵkJ|&sLKI*2 FZ @F!g 17))=;1i` ķs'`2$rք|vf-ehQ1 ۺw㼼 ]FE&/t:zxt.((35cϥ0ZB:kvqc5EhDÆBӡC(v,}(fYϺvq"%jB fb7Ξ֭-HN%+CCg8:{?~wGX$!?)|VB[ի[K}Q <\40(1h鱥MǗ"*_]Oė.m#IWϟjoo-+/&<7o$82 jRBkqq_֩S &&..JRZDq %dĨ}Խ`ٳgbΜF 0bj̤3cKTXgɒ)`V^BpįQT+ G|2;Bed[>[EBxWɯyjn8336ǎu۸qb d̘~m , eݺʎa>.((c]&^?.뷾T3ufy`F!'簐NLBO4wbDF::%(T!(ȏ2*&&B kړIVOys#Kf; z-h$??`HR}wr70 `h2o󧃾61$(>2ZgŊOիceՌ7nl%o_TQ'Z5~l:Xӡ&9yL~E0 %Am2IUNbotwrH%8x Is\];'%m` B(ߴiC0//#zk?(>׳7n@z`>.|Jv0eʫC\h7L~)Um>NC߱cY~ !9i?fH 0iE,WNKywtEE`(jSjj)`.Q !( F1H 0"y0 `CH0.Q !( @F0 *`Z7ٳ;8n&=O\ ET 0HFi۶GÆvz)n!! 0? Q;U!L\9(YqgyߵkIϞه]_ލ{UJ4)aPU0 >#S'[ qzgϟдiC33iFT*Q2UL\9(͚?))X8e*S%Δ0 *`ZÑ]GЁ Nrqq-[>d*5e*S%Δ0 *`ZÑBVڵC6Vt:gV--wcG gLh S.(`nGŸ%ǰ23*%CrFU @oa0 *`0LS.(`H(ƞ`Ƀ\BQ$pb F<`0!$E`T^ ;-`F`Vۮ1IENDB`java-design-patterns-1.9.0/state/index.md000066400000000000000000000021771264154357600203440ustar00rootroot00000000000000--- layout: pattern title: State folder: state permalink: /patterns/state/ categories: Behavioral tags: - Java - Difficulty-Intermediate - Gang Of Four --- **Also known as:** Objects for States **Intent:** Allow an object to alter its behavior when its internal state changes. The object will appear to change its class. ![alt text](./etc/state_1.png "State") **Applicability:** Use the State pattern in either of the following cases * an object's behavior depends on its state, and it must change its behavior at run-time depending on that state * operations have large, multipart conditional statements that depend on the object's state. This state is usually represented by one or more enumerated constants. Often, several operations will contain this same conditional structure. The State pattern puts each branch of the conditional in a separate class. This lets you treat the object's state as an object in its own right that can vary independently from other objects. **Credits** * [Design Patterns: Elements of Reusable Object-Oriented Software](http://www.amazon.com/Design-Patterns-Elements-Reusable-Object-Oriented/dp/0201633612) java-design-patterns-1.9.0/state/pom.xml000066400000000000000000000013641264154357600202250ustar00rootroot00000000000000 4.0.0 com.iluwatar java-design-patterns 1.9.0 state junit junit test org.mockito mockito-core test java-design-patterns-1.9.0/state/src/000077500000000000000000000000001264154357600174735ustar00rootroot00000000000000java-design-patterns-1.9.0/state/src/main/000077500000000000000000000000001264154357600204175ustar00rootroot00000000000000java-design-patterns-1.9.0/state/src/main/java/000077500000000000000000000000001264154357600213405ustar00rootroot00000000000000java-design-patterns-1.9.0/state/src/main/java/com/000077500000000000000000000000001264154357600221165ustar00rootroot00000000000000java-design-patterns-1.9.0/state/src/main/java/com/iluwatar/000077500000000000000000000000001264154357600237465ustar00rootroot00000000000000java-design-patterns-1.9.0/state/src/main/java/com/iluwatar/state/000077500000000000000000000000001264154357600250665ustar00rootroot00000000000000java-design-patterns-1.9.0/state/src/main/java/com/iluwatar/state/AngryState.java000066400000000000000000000007071264154357600300160ustar00rootroot00000000000000package com.iluwatar.state; /** * * Angry state. * */ public class AngryState implements State { private Mammoth mammoth; public AngryState(Mammoth mammoth) { this.mammoth = mammoth; } @Override public void observe() { System.out.println(String.format("%s is furious!", mammoth)); } @Override public void onEnterState() { System.out.println(String.format("%s gets angry!", mammoth)); } } java-design-patterns-1.9.0/state/src/main/java/com/iluwatar/state/App.java000066400000000000000000000013471264154357600264560ustar00rootroot00000000000000package com.iluwatar.state; /** * * In State pattern the container object has an internal state object that defines the current * behavior. The state object can be changed to alter the behavior. *

    * This can be a cleaner way for an object to change its behavior at runtime without resorting to * large monolithic conditional statements and thus improves maintainability. *

    * In this example the {@link Mammoth} changes its behavior as time passes by. * */ public class App { /** * Program entry point */ public static void main(String[] args) { Mammoth mammoth = new Mammoth(); mammoth.observe(); mammoth.timePasses(); mammoth.observe(); mammoth.timePasses(); mammoth.observe(); } } java-design-patterns-1.9.0/state/src/main/java/com/iluwatar/state/Mammoth.java000066400000000000000000000013441264154357600273350ustar00rootroot00000000000000package com.iluwatar.state; /** * * Mammoth has internal state that defines its behavior. * */ public class Mammoth { private State state; public Mammoth() { state = new PeacefulState(this); } /** * Makes time pass for the mammoth */ public void timePasses() { if (state.getClass().equals(PeacefulState.class)) { changeStateTo(new AngryState(this)); } else { changeStateTo(new PeacefulState(this)); } } private void changeStateTo(State newState) { this.state = newState; this.state.onEnterState(); } @Override public String toString() { return "The mammoth"; } public void observe() { this.state.observe(); } } java-design-patterns-1.9.0/state/src/main/java/com/iluwatar/state/PeacefulState.java000066400000000000000000000007321264154357600304600ustar00rootroot00000000000000package com.iluwatar.state; /** * * Peaceful state. * */ public class PeacefulState implements State { private Mammoth mammoth; public PeacefulState(Mammoth mammoth) { this.mammoth = mammoth; } @Override public void observe() { System.out.println(String.format("%s is calm and peaceful.", mammoth)); } @Override public void onEnterState() { System.out.println(String.format("%s calms down.", mammoth)); } } java-design-patterns-1.9.0/state/src/main/java/com/iluwatar/state/State.java000066400000000000000000000002261264154357600270110ustar00rootroot00000000000000package com.iluwatar.state; /** * * State interface. * */ public interface State { void onEnterState(); void observe(); } java-design-patterns-1.9.0/state/src/test/000077500000000000000000000000001264154357600204525ustar00rootroot00000000000000java-design-patterns-1.9.0/state/src/test/java/000077500000000000000000000000001264154357600213735ustar00rootroot00000000000000java-design-patterns-1.9.0/state/src/test/java/com/000077500000000000000000000000001264154357600221515ustar00rootroot00000000000000java-design-patterns-1.9.0/state/src/test/java/com/iluwatar/000077500000000000000000000000001264154357600240015ustar00rootroot00000000000000java-design-patterns-1.9.0/state/src/test/java/com/iluwatar/state/000077500000000000000000000000001264154357600251215ustar00rootroot00000000000000java-design-patterns-1.9.0/state/src/test/java/com/iluwatar/state/AppTest.java000066400000000000000000000003001264154357600273350ustar00rootroot00000000000000package com.iluwatar.state; import org.junit.Test; /** * * Application test * */ public class AppTest { @Test public void test() { String[] args = {}; App.main(args); } } java-design-patterns-1.9.0/state/src/test/java/com/iluwatar/state/MammothTest.java000066400000000000000000000045521264154357600302340ustar00rootroot00000000000000package com.iluwatar.state; import org.junit.After; import org.junit.Before; import org.junit.Test; import org.mockito.InOrder; import org.mockito.Mockito; import java.io.PrintStream; import static org.junit.Assert.assertEquals; import static org.junit.Assert.assertNotNull; import static org.mockito.Mockito.mock; /** * Date: 12/29/15 - 8:27 PM * * @author Jeroen Meulemeester */ public class MammothTest { /** * The mocked standard out {@link PrintStream}, required since some actions don't have any * influence on accessible objects, except for writing to std-out using {@link System#out} */ private final PrintStream stdOutMock = mock(PrintStream.class); /** * Keep the original std-out so it can be restored after the test */ private final PrintStream stdOutOrig = System.out; /** * Inject the mocked std-out {@link PrintStream} into the {@link System} class before each test */ @Before public void setUp() { System.setOut(this.stdOutMock); } /** * Removed the mocked std-out {@link PrintStream} again from the {@link System} class */ @After public void tearDown() { System.setOut(this.stdOutOrig); } /** * Switch to a complete mammoth 'mood'-cycle and verify if the observed mood matches the expected * value. */ @Test public void testTimePasses() { final InOrder inOrder = Mockito.inOrder(this.stdOutMock); final Mammoth mammoth = new Mammoth(); mammoth.observe(); inOrder.verify(this.stdOutMock).println("The mammoth is calm and peaceful."); inOrder.verifyNoMoreInteractions(); mammoth.timePasses(); inOrder.verify(this.stdOutMock).println("The mammoth gets angry!"); inOrder.verifyNoMoreInteractions(); mammoth.observe(); inOrder.verify(this.stdOutMock).println("The mammoth is furious!"); inOrder.verifyNoMoreInteractions(); mammoth.timePasses(); inOrder.verify(this.stdOutMock).println("The mammoth calms down."); inOrder.verifyNoMoreInteractions(); mammoth.observe(); inOrder.verify(this.stdOutMock).println("The mammoth is calm and peaceful."); inOrder.verifyNoMoreInteractions(); } /** * Verify if {@link Mammoth#toString()} gives the expected value */ @Test public void testToString() { final String toString = new Mammoth().toString(); assertNotNull(toString); assertEquals("The mammoth", toString); } }java-design-patterns-1.9.0/step-builder/000077500000000000000000000000001264154357600201635ustar00rootroot00000000000000java-design-patterns-1.9.0/step-builder/etc/000077500000000000000000000000001264154357600207365ustar00rootroot00000000000000java-design-patterns-1.9.0/step-builder/etc/step-builder.png000066400000000000000000002244061264154357600240530ustar00rootroot00000000000000PNG  IHDRWj(IDATx] \OgPRDS)D%i"=PBʖ<$$QbQ1l8Ϧ1fmc{}R>}{9sνTQ@ ^U.@ @ ‹@ *o1O  JT~bI@ $$'AFB %BJA#PDV!xk&@*7*dq$'\3AVT01eΝMѼyð0OOرhђ_]Sj{L dDF2ReC?vEZbz>~ߥK9{\뉒 #*yxs"dʆ_'ڌt^1ϓCuТE!~Ȑ^N%#PXicc&Nוۼqc#Y)>˗w!Ν<)@zq|Vj@cAU޼~kܸ]w ~8C0 !q]5) SNNbACVR GfhTy֭"iSDH7W&NqY-k=G-Z411q ثW\۞99|Հbƃ/Lsr~8:WVVOzSW1!~]۩S3з/)#g)>~sFc蘙Yz{ 8m3g [nFpTA&M?%;;^xڮ ,,ڝ=ZRT4 D51*k`N?A;;ҥ}jĸ{:ѓ~]褮]Mc ic,>^Pzb8RęT1!Dwgk11޹sÇ;mm6rvX]0U5&`*Or*Zq#FR&INrd+9H Yk"O<7]FCe3 W?M57'*8"G=7y'ԆCu֝zOtdBr*қQY~Y3|݋0b$7 Tِ~:}Th2^;&(fpѣfմiZjv!+k"ϝKmQeOz,%/ձc+#(lI_~V_TVY11A%%faCݵ+yyI/q Uz-kl*#ˆA|PHFlG?0M>`;v"|%;>u.~ ի틏iaѮjժ99zjoڇl."#q]ۅ h2@9sƼmfaǎE ͒섄_}Aoq2.1"ē"#<~r\RGOR&0N>cb}a?t#J:m޹spѧO) ̬MuOL5kְ1?D#Z=cW?=^m[IZjiqvslagg\jƛo6!^^rΒ|̶<2nĉ (Ke|pT2;u릍re_{F?p`ԑ5j0%BuBFJO+VLkܸ~VM|}9K #L7WX3z0r m~K@A,bj'%=kZ%Ȅ5LOpq[jߏ&SaOYX{[;w.Z!{jժ9vm!}`GA8!a6ޢEcښS_I7c8n:,^?kౙG^cAcvH3_O?esI<،^vӴi9vT~''[f݂Ytk1Ay~:.'yʃ('v<)I~SwF'Ou9Kjњ[#͢F& mk22bLwj_߰Fԩ#֙~ұk&P1O~:o=hΛval?CBYʿwdX6-[6ai~\,˿\+'0j_|pGǸw6O߷xIv,~~EOa)#6& mW㹦ڵ]h^k׮=o{Uiv#^,`ňquSVx?qq8Jsv^ c֭=th 7~@ X!O`Դ%'$C> c«.5\3A ɫN9-5e ;o֎K# pߑW8G0L?1dۡC+uB#8\a1q;jݺPV=Z%GeIKQ8:x0np{ww{|mlX ڲe>Ww9]dK=hso32b͙36O@+(3T&)Ζ_ R.jjfX+ cTЫ~BMO_ҥS 5kfE<=Pat0 mj{NN"Ba>ƍ-,: р?^E@z>x`s4"K ?%g[jHmjjfB!|gϲ!fdd\|aDnܸDFF={ cOOOpRR]ZZqqq&&&᪈ccI&ZiXCdʆ^/CDk>?JpĈH zcC̊:z\ j|\sK^^‡J']0NIIvJc]BTw ܹs?> K.ܱ.,Ó_v^ (2gvaeF]صɮ׋G>DC*>jAIL4@0~5j*LH rb(P>I?)}T5fRW QE7do&[p)=} _~dOa.D䥕~R<5 kHXܮ]νti1yhnZhq<رc͛#F޽˱w}Lv5=x0?ku9ںcq }BC;v,j OOwąy8Ĥ@InJRm'!mº|œ\3AOr#pSRɓ۷m1G CΝ[7ei fؖ-ɳgSzde0 })(,¨qc8mcU''H%DBW1$(LJJ8DY$V~?ŔӪ/P<5 $7*# ,ܼyCM3}}5z2e:J-;ΜeiiBW}Վp-[滸&MrW0~~PN,iTf[wI 'T(U?q)5'm&Yv\ mqK7i? _H6#ӗ CnGgSi*~fx,Y3Oz|jOٞ %aa~O*ߧoh.!ha^^Rjj֬v/6kL.[ϐ@P~H ǟ뢟&Mr߰! ̘zU%'uO~?čDSӖglA h;rJz~]U:ރ8v,W$7%VǏti8{~M !h!so%ݻwҘr)=5k }fϏh|[njdTCV,E;'4ǻF 'ԏ)|~x&uo{jܧmllpKՀ[# PPL?,{@%zZ^C::5lX}Yz^?ܹ:U8$1N(g@ J*!3`c3gz=&T2OlHUU8F+wctdǪH+deq˜D\ HV~:d' g /*p-<),d_:^ 8p``Wzo熑#p@hy A| JI ibիViO6EZ{ OXƲwHǎ^uUJz8!U}|F0FqSǪH+n׻wt>"yy*&OX1mΜ1 T%t ¾Nȹ6LT% >%d 4Tn Z4 CZ~?ޅ]Li)aZZf_ 7jOѤI1&胲F\_?_|ϼ*fi˖^^hHnoI%ӍvxN_  W200md31c׹zl"|F#R-h5ss%н7Vj2JOdN]/Zt?𧝬i AV41N^:|xr޽ӹskZ^CݥG3t1OP^Zڵ֭ݾw/Ug7F/eT~B40z{b3i)!sϏ8'зo_^AAtU\\SV0gcbl"|F #41Z,g%?xhݺP8قͲUV*~R$+D?|'aNI֣G31NJ=1cccc ߛk#K>13+Tb%URGh-7q,yNBGYj2JOd触fbJ~e$3U/z JBaa!~mll5+IIIoV;$FFF%UHHHIhT@dCeD7I?UrPH~R>54SRR Tj$xI @EiIC*7*eǏڠAkC4p:S9~1w9yIF===Ϟ=[ʍdFY,ͽVV7%}|_Bt~9~_L},' C~R>5222֭e kHXCcWNj_V.뽎7>/^X ȐҬSYP05Ν;tPzǛF2ReC]ʧ`ݻq&k%s'B,dHi;߀IYθ|rllJBBBY'%$7*# 'kk_r_N@nX? \ Q־,\a $7*'.eI}tY?/"=-' 7]^^Rjj֬v/6kL_/ϭޥ3wxO|UH:h2 ]^X(=&FFFI?T!RUBnOwbKOO.뽖wXN@"~P;z~ZXc2pܵ:ddTcHYv epeOO糰Z^R@('ݟj_?t\ﵼ>/~~\d O!B}#X{s*.@Vo'av3Oc8p7o_-._ ePا~S ܳcV7G{Oqzְa}PYFITb+DGG EJO+rm7/GoP{[ӧ{Bv\|T@LpwիW?]?m33c7\'N@aYAApOF55m ĥ۲eyl*t*/,#g-AI {L0dbb$uq "娟ğW fZcƮsD$?{[fym1ͭ_vvOOmذoiOǻp5LhyC!--+f~R;k ܛ:c Oʲ-qz̴8h-d.o;::֩S 'E9'|wT=rœsyH~s{{dihÇ?;x1ml+ŽO1,=07>ݓ˟I"FN?A,7OJZ^|R/,Ӏ/\ئ=& K`x%?OSXqΘf~H~~5H{nPѿu1_?Amԯ_LsddolR- O?n:߱]IIFF5į-'‚8=b,-MOo=~=&/ *qqqiii4TM?H?)zOK9,; 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The user experience will be much more improved by the fact that he will only see the next step methods available, NO build method until is the right time to build the object. ![alt text](./etc/step-builder.png "Step Builder") **Applicability:** Use the Step Builder pattern when the algorithm for creating a complex object should be independent of the parts that make up the object and how they're assembled the construction process must allow different representations for the object that's constructed when in the process of constructing the order is important. **Credits:** * [Marco Castigliego - Step Builder](http://rdafbn.blogspot.co.uk/2012/07/step-builder-pattern_28.html) java-design-patterns-1.9.0/step-builder/pom.xml000066400000000000000000000012131264154357600214750ustar00rootroot00000000000000 4.0.0 java-design-patterns com.iluwatar 1.9.0 step-builder junit junit test java-design-patterns-1.9.0/step-builder/src/000077500000000000000000000000001264154357600207525ustar00rootroot00000000000000java-design-patterns-1.9.0/step-builder/src/main/000077500000000000000000000000001264154357600216765ustar00rootroot00000000000000java-design-patterns-1.9.0/step-builder/src/main/java/000077500000000000000000000000001264154357600226175ustar00rootroot00000000000000java-design-patterns-1.9.0/step-builder/src/main/java/com/000077500000000000000000000000001264154357600233755ustar00rootroot00000000000000java-design-patterns-1.9.0/step-builder/src/main/java/com/iluwatar/000077500000000000000000000000001264154357600252255ustar00rootroot00000000000000java-design-patterns-1.9.0/step-builder/src/main/java/com/iluwatar/stepbuilder/000077500000000000000000000000001264154357600275475ustar00rootroot00000000000000java-design-patterns-1.9.0/step-builder/src/main/java/com/iluwatar/stepbuilder/App.java000066400000000000000000000037171264154357600311420ustar00rootroot00000000000000package com.iluwatar.stepbuilder; /** * Step Builder Pattern * *

    * Intent
    * An extension of the Builder pattern that fully guides the user through the creation of the object * with no chances of confusion.
    * The user experience will be much more improved by the fact that he will only see the next step * methods available, NO build method until is the right time to build the object. * *

    * Implementation *

      * The concept is simple: * *
    • Write creational steps inner classes or interfaces where each method knows what can be * displayed next.
      • * *
    • Implement all your steps interfaces in an inner static class.
      • * *
    • Last step is the BuildStep, in charge of creating the object you need to build.
      • *
    * *

    * Applicability
    * Use the Step Builder pattern when the algorithm for creating a complex object should be * independent of the parts that make up the object and how they're assembled the construction * process must allow different representations for the object that's constructed when in the * process of constructing the order is important. *

    * http://rdafbn.blogspot.co.uk/2012/07/step-builder-pattern_28.html */ public class App { /** * Program entry point * * @param args command line args */ public static void main(String[] args) { Character warrior = CharacterStepBuilder.newBuilder().name("Amberjill").fighterClass("Paladin") .withWeapon("Sword").noAbilities().build(); System.out.println(warrior); Character mage = CharacterStepBuilder.newBuilder().name("Riobard").wizardClass("Sorcerer") .withSpell("Fireball").withAbility("Fire Aura").withAbility("Teleport") .noMoreAbilities().build(); System.out.println(mage); Character thief = CharacterStepBuilder.newBuilder().name("Desmond").fighterClass("Rogue").noWeapon().build(); System.out.println(thief); } } java-design-patterns-1.9.0/step-builder/src/main/java/com/iluwatar/stepbuilder/Character.java000066400000000000000000000032071264154357600323100ustar00rootroot00000000000000package com.iluwatar.stepbuilder; import java.util.List; /** * The class with many parameters. */ public class Character { private String name; private String fighterClass; private String wizardClass; private String weapon; private String spell; private List abilities; public Character(String name) { this.name = name; } public String getName() { return name; } public void setName(String name) { this.name = name; } public String getFighterClass() { return fighterClass; } public void setFighterClass(String fighterClass) { this.fighterClass = fighterClass; } public String getWizardClass() { return wizardClass; } public void setWizardClass(String wizardClass) { this.wizardClass = wizardClass; } public String getWeapon() { return weapon; } public void setWeapon(String weapon) { this.weapon = weapon; } public String getSpell() { return spell; } public void setSpell(String spell) { this.spell = spell; } public List getAbilities() { return abilities; } public void setAbilities(List abilities) { this.abilities = abilities; } @Override public String toString() { StringBuilder sb = new StringBuilder(); sb.append("This is a "); sb.append(fighterClass != null ? fighterClass : wizardClass); sb.append(" named "); sb.append(name); sb.append(" armed with a "); sb.append(weapon != null ? weapon : spell != null ? spell : "with nothing"); sb.append(abilities != null ? (" and wielding " + abilities + " abilities") : ""); sb.append("."); return sb.toString(); } } CharacterStepBuilder.java000066400000000000000000000070361264154357600344000ustar00rootroot00000000000000java-design-patterns-1.9.0/step-builder/src/main/java/com/iluwatar/stepbuilderpackage com.iluwatar.stepbuilder; import java.util.ArrayList; import java.util.List; /** * The Step Builder class. */ public class CharacterStepBuilder { private CharacterStepBuilder() {} public static NameStep newBuilder() { return new CharacterSteps(); } /** * First Builder Step in charge of the Character name. Next Step available : ClassStep */ public interface NameStep { ClassStep name(String name); } /** * This step is in charge of setting the Character class (fighter or wizard). Fighter choice : * Next Step available : WeaponStep Wizard choice : Next Step available : SpellStep */ public interface ClassStep { WeaponStep fighterClass(String fighterClass); SpellStep wizardClass(String wizardClass); } /** * This step is in charge of the weapon. Weapon choice : Next Step available : AbilityStep No * weapon choice : Next Step available : BuildStep */ public interface WeaponStep { AbilityStep withWeapon(String weapon); BuildStep noWeapon(); } /** * This step is in charge of the spell. Spell choice : Next Step available : AbilityStep No spell * choice : Next Step available : BuildStep */ public interface SpellStep { AbilityStep withSpell(String spell); BuildStep noSpell(); } /** * This step is in charge of abilities. Next Step available : BuildStep */ public interface AbilityStep { AbilityStep withAbility(String ability); BuildStep noMoreAbilities(); BuildStep noAbilities(); } /** * This is the final step in charge of building the Character Object. Validation should be here. */ public interface BuildStep { Character build(); } /** * Step Builder implementation. */ private static class CharacterSteps implements NameStep, ClassStep, WeaponStep, SpellStep, AbilityStep, BuildStep { private String name; private String fighterClass; private String wizardClass; private String weapon; private String spell; private List abilities = new ArrayList<>(); @Override public ClassStep name(String name) { this.name = name; return this; } @Override public WeaponStep fighterClass(String fighterClass) { this.fighterClass = fighterClass; return this; } @Override public SpellStep wizardClass(String wizardClass) { this.wizardClass = wizardClass; return this; } @Override public AbilityStep withWeapon(String weapon) { this.weapon = weapon; return this; } @Override public BuildStep noWeapon() { return this; } @Override public AbilityStep withSpell(String spell) { this.spell = spell; return this; } @Override public BuildStep noSpell() { return this; } @Override public AbilityStep withAbility(String ability) { this.abilities.add(ability); return this; } @Override public BuildStep noMoreAbilities() { return this; } @Override public BuildStep noAbilities() { return this; } @Override public Character build() { Character character = new Character(name); if (fighterClass != null) { character.setFighterClass(fighterClass); } else { character.setWizardClass(wizardClass); } if (weapon != null) { character.setWeapon(weapon); } else { character.setSpell(spell); } if (!abilities.isEmpty()) { character.setAbilities(abilities); } return character; } } } java-design-patterns-1.9.0/step-builder/src/test/000077500000000000000000000000001264154357600217315ustar00rootroot00000000000000java-design-patterns-1.9.0/step-builder/src/test/java/000077500000000000000000000000001264154357600226525ustar00rootroot00000000000000java-design-patterns-1.9.0/step-builder/src/test/java/com/000077500000000000000000000000001264154357600234305ustar00rootroot00000000000000java-design-patterns-1.9.0/step-builder/src/test/java/com/iluwatar/000077500000000000000000000000001264154357600252605ustar00rootroot00000000000000java-design-patterns-1.9.0/step-builder/src/test/java/com/iluwatar/stepbuilder/000077500000000000000000000000001264154357600276025ustar00rootroot00000000000000java-design-patterns-1.9.0/step-builder/src/test/java/com/iluwatar/stepbuilder/AppTest.java000066400000000000000000000003071264154357600320250ustar00rootroot00000000000000package com.iluwatar.stepbuilder; import org.junit.Test; /** * * Application test * */ public class AppTest { @Test public void test() { String[] args = {}; App.main(args); } } CharacterStepBuilderTest.java000066400000000000000000000105331264154357600352670ustar00rootroot00000000000000java-design-patterns-1.9.0/step-builder/src/test/java/com/iluwatar/stepbuilderpackage com.iluwatar.stepbuilder; import org.junit.Test; import java.util.List; import static org.junit.Assert.assertEquals; import static org.junit.Assert.assertNotNull; import static org.junit.Assert.assertNull; import static org.junit.Assert.assertTrue; /** * Date: 12/29/15 - 9:21 PM * * @author Jeroen Meulemeester */ public class CharacterStepBuilderTest { /** * Build a new wizard {@link Character} and verify if it has the expected attributes */ @Test public void testBuildWizard() { final Character character = CharacterStepBuilder.newBuilder() .name("Merlin") .wizardClass("alchemist") .withSpell("poison") .withAbility("invisibility") .withAbility("wisdom") .noMoreAbilities() .build(); assertEquals("Merlin", character.getName()); assertEquals("alchemist", character.getWizardClass()); assertEquals("poison", character.getSpell()); assertNotNull(character.toString()); final List abilities = character.getAbilities(); assertNotNull(abilities); assertEquals(2, abilities.size()); assertTrue(abilities.contains("invisibility")); assertTrue(abilities.contains("wisdom")); } /** * Build a new wizard {@link Character} without spell or abilities and verify if it has the * expected attributes */ @Test public void testBuildPoorWizard() { final Character character = CharacterStepBuilder.newBuilder() .name("Merlin") .wizardClass("alchemist") .noSpell() .build(); assertEquals("Merlin", character.getName()); assertEquals("alchemist", character.getWizardClass()); assertNull(character.getSpell()); assertNull(character.getAbilities()); assertNotNull(character.toString()); } /** * Build a new wizard {@link Character} and verify if it has the expected attributes */ @Test public void testBuildWeakWizard() { final Character character = CharacterStepBuilder.newBuilder() .name("Merlin") .wizardClass("alchemist") .withSpell("poison") .noAbilities() .build(); assertEquals("Merlin", character.getName()); assertEquals("alchemist", character.getWizardClass()); assertEquals("poison", character.getSpell()); assertNull(character.getAbilities()); assertNotNull(character.toString()); } /** * Build a new warrior {@link Character} and verify if it has the expected attributes */ @Test public void testBuildWarrior() { final Character character = CharacterStepBuilder.newBuilder() .name("Cuauhtemoc") .fighterClass("aztec") .withWeapon("spear") .withAbility("speed") .withAbility("strength") .noMoreAbilities() .build(); assertEquals("Cuauhtemoc", character.getName()); assertEquals("aztec", character.getFighterClass()); assertEquals("spear", character.getWeapon()); assertNotNull(character.toString()); final List abilities = character.getAbilities(); assertNotNull(abilities); assertEquals(2, abilities.size()); assertTrue(abilities.contains("speed")); assertTrue(abilities.contains("strength")); } /** * Build a new wizard {@link Character} without weapon and abilities and verify if it has the * expected attributes */ @Test public void testBuildPoorWarrior() { final Character character = CharacterStepBuilder.newBuilder() .name("Poor warrior") .fighterClass("none") .noWeapon() .build(); assertEquals("Poor warrior", character.getName()); assertEquals("none", character.getFighterClass()); assertNull(character.getWeapon()); assertNull(character.getAbilities()); assertNotNull(character.toString()); } /** * Build a new warrior {@link Character} without any abilities, but with a weapon and verify if it * has the expected attributes */ @Test public void testBuildWeakWarrior() { final Character character = CharacterStepBuilder.newBuilder() .name("Weak warrior") .fighterClass("none") .withWeapon("Slingshot") .noAbilities() .build(); assertEquals("Weak warrior", character.getName()); assertEquals("none", character.getFighterClass()); assertEquals("Slingshot", character.getWeapon()); assertNull(character.getAbilities()); assertNotNull(character.toString()); } }java-design-patterns-1.9.0/strategy/000077500000000000000000000000001264154357600174265ustar00rootroot00000000000000java-design-patterns-1.9.0/strategy/etc/000077500000000000000000000000001264154357600202015ustar00rootroot00000000000000java-design-patterns-1.9.0/strategy/etc/strategy.png000066400000000000000000000360411264154357600225550ustar00rootroot00000000000000PNG  IHDR-|;IDATx}ml-yF~ ׬4*D݆L XqmKPEBD)W Q|$ݰVyȦU|lJe*sk[}TE 1@GĖE&h{]ō?9;1sٝy< svg}ggfgcugS@ԃT\.X.7TIJ`0r ]pbD,{Ha!+ "=$tX3`076e L"" bCB5fs`3XÕV/1:cP}lx0+2o{{2;~bp׊L`Wxen͏ewѫa \@>lﰼ h fxWpo02ܻWb2@2m\)3LƅĝL&;6RBck +\3o{,aeTâ+PĨqAImFhde*lYvF'Q,ꝥҙ`WΘ7½s"]ew"FӵDu؛ږlz4LyXSwЍ`Wn7½M)eny{MD<4L0'7lLB{b^ጹ}#;g?(ҥX{/btkƇn'v3SiW 7ޓwó;-*R0+F fJc0V%;h` a0uiNqMVy֐IN;>r07½|:prna7 !Zuit'W9`Wܾ 68fFI \"=$tX3`076e L"" bCB5fs`3Xa$+ "=$tX3`076e L"" bC߸گ,yM~L^䕹"|2J3 1)J3ב|ty*kM lÝܒ0q|8ge!EM,[! ^ΕΤ:R]:ywko_'v>›DUhJ0 1 3Ko֗5-s]+Fƃy//.Zrs{jHktiU,ՌKʝ:].䁉{'D_K^J4W_##'PɹELå8ጕo׊{0E%_:I+lnXdq4$njX;!l3+ԫb:dMn>mOӣ/Ο.ˇ/dM谏r-xIr_|Go; 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Strategy lets the algorithm vary independently from clients that use it. ![alt text](./etc/strategy_1.png "Strategy") **Applicability:** Use the Strategy pattern when * many related classes differ only in their behavior. Strategies provide a way to configure a class either one of many behaviors * you need different variants of an algorithm. for example, you might define algorithms reflecting different space/time trade-offs. Strategies can be used when these variants are implemented as a class hierarchy of algorithms * an algorithm uses data that clients shouldn't know about. Use the Strategy pattern to avoid exposing complex, algorithm-specific data structures * a class defines many behaviors, and these appear as multiple conditional statements in its operations. Instead of many conditionals, move related conditional branches into their own Strategy class **Credits** * [Design Patterns: Elements of Reusable Object-Oriented Software](http://www.amazon.com/Design-Patterns-Elements-Reusable-Object-Oriented/dp/0201633612) java-design-patterns-1.9.0/strategy/pom.xml000066400000000000000000000013671264154357600207520ustar00rootroot00000000000000 4.0.0 com.iluwatar java-design-patterns 1.9.0 strategy junit junit test org.mockito mockito-core test java-design-patterns-1.9.0/strategy/src/000077500000000000000000000000001264154357600202155ustar00rootroot00000000000000java-design-patterns-1.9.0/strategy/src/main/000077500000000000000000000000001264154357600211415ustar00rootroot00000000000000java-design-patterns-1.9.0/strategy/src/main/java/000077500000000000000000000000001264154357600220625ustar00rootroot00000000000000java-design-patterns-1.9.0/strategy/src/main/java/com/000077500000000000000000000000001264154357600226405ustar00rootroot00000000000000java-design-patterns-1.9.0/strategy/src/main/java/com/iluwatar/000077500000000000000000000000001264154357600244705ustar00rootroot00000000000000java-design-patterns-1.9.0/strategy/src/main/java/com/iluwatar/strategy/000077500000000000000000000000001264154357600263325ustar00rootroot00000000000000java-design-patterns-1.9.0/strategy/src/main/java/com/iluwatar/strategy/App.java000066400000000000000000000036551264154357600277260ustar00rootroot00000000000000package com.iluwatar.strategy; /** * * The Strategy pattern (also known as the policy pattern) is a software design pattern that enables * an algorithm's behavior to be selected at runtime. *

    * Before Java 8 the Strategies needed to be separate classes forcing the developer * to write lots of boilerplate code. With modern Java it is easy to pass behavior * with method references and lambdas making the code shorter and more readable. *

    * In this example ({@link DragonSlayingStrategy}) encapsulates an algorithm. The containing object * ({@link DragonSlayer}) can alter its behavior by changing its strategy. * */ public class App { /** * Program entry point * * @param args command line args */ public static void main(String[] args) { // GoF Strategy pattern System.out.println("Green dragon spotted ahead!"); DragonSlayer dragonSlayer = new DragonSlayer(new MeleeStrategy()); dragonSlayer.goToBattle(); System.out.println("Red dragon emerges."); dragonSlayer.changeStrategy(new ProjectileStrategy()); dragonSlayer.goToBattle(); System.out.println("Black dragon lands before you."); dragonSlayer.changeStrategy(new SpellStrategy()); dragonSlayer.goToBattle(); // Java 8 Strategy pattern System.out.println("Green dragon spotted ahead!"); dragonSlayer = new DragonSlayer( () -> System.out.println("With your Excalibur you severe the dragon's head!")); dragonSlayer.goToBattle(); System.out.println("Red dragon emerges."); dragonSlayer.changeStrategy(() -> System.out.println( "You shoot the dragon with the magical crossbow and it falls dead on the ground!")); dragonSlayer.goToBattle(); System.out.println("Black dragon lands before you."); dragonSlayer.changeStrategy(() -> System.out.println( "You cast the spell of disintegration and the dragon vaporizes in a pile of dust!")); dragonSlayer.goToBattle(); } } java-design-patterns-1.9.0/strategy/src/main/java/com/iluwatar/strategy/DragonSlayer.java000066400000000000000000000007051264154357600315710ustar00rootroot00000000000000package com.iluwatar.strategy; /** * * DragonSlayer uses different strategies to slay the dragon. * */ public class DragonSlayer { private DragonSlayingStrategy strategy; public DragonSlayer(DragonSlayingStrategy strategy) { this.strategy = strategy; } public void changeStrategy(DragonSlayingStrategy strategy) { this.strategy = strategy; } public void goToBattle() { strategy.execute(); } } java-design-patterns-1.9.0/strategy/src/main/java/com/iluwatar/strategy/DragonSlayingStrategy.java000066400000000000000000000002501264154357600334560ustar00rootroot00000000000000package com.iluwatar.strategy; /** * * Strategy interface. * */ @FunctionalInterface public interface DragonSlayingStrategy { void execute(); } java-design-patterns-1.9.0/strategy/src/main/java/com/iluwatar/strategy/MeleeStrategy.java000066400000000000000000000004101264154357600317420ustar00rootroot00000000000000package com.iluwatar.strategy; /** * * Melee strategy. * */ public class MeleeStrategy implements DragonSlayingStrategy { @Override public void execute() { System.out.println("With your Excalibur you severe the dragon's head!"); } } java-design-patterns-1.9.0/strategy/src/main/java/com/iluwatar/strategy/ProjectileStrategy.java000066400000000000000000000004721264154357600330230ustar00rootroot00000000000000package com.iluwatar.strategy; /** * * Projectile strategy. * */ public class ProjectileStrategy implements DragonSlayingStrategy { @Override public void execute() { System.out .println("You shoot the dragon with the magical crossbow and it falls dead on the ground!"); } } java-design-patterns-1.9.0/strategy/src/main/java/com/iluwatar/strategy/SpellStrategy.java000066400000000000000000000004631264154357600320020ustar00rootroot00000000000000package com.iluwatar.strategy; /** * * Spell strategy. * */ public class SpellStrategy implements DragonSlayingStrategy { @Override public void execute() { System.out .println("You cast the spell of disintegration and the dragon vaporizes in a pile of dust!"); } } java-design-patterns-1.9.0/strategy/src/test/000077500000000000000000000000001264154357600211745ustar00rootroot00000000000000java-design-patterns-1.9.0/strategy/src/test/java/000077500000000000000000000000001264154357600221155ustar00rootroot00000000000000java-design-patterns-1.9.0/strategy/src/test/java/com/000077500000000000000000000000001264154357600226735ustar00rootroot00000000000000java-design-patterns-1.9.0/strategy/src/test/java/com/iluwatar/000077500000000000000000000000001264154357600245235ustar00rootroot00000000000000java-design-patterns-1.9.0/strategy/src/test/java/com/iluwatar/strategy/000077500000000000000000000000001264154357600263655ustar00rootroot00000000000000java-design-patterns-1.9.0/strategy/src/test/java/com/iluwatar/strategy/AppTest.java000066400000000000000000000003041264154357600306050ustar00rootroot00000000000000package com.iluwatar.strategy; import org.junit.Test; /** * * Application test * */ public class AppTest { @Test public void test() { String[] args = {}; App.main(args); } } java-design-patterns-1.9.0/strategy/src/test/java/com/iluwatar/strategy/DragonSlayerTest.java000066400000000000000000000024661264154357600324720ustar00rootroot00000000000000package com.iluwatar.strategy; import org.junit.Test; import static org.mockito.Mockito.mock; import static org.mockito.Mockito.verify; import static org.mockito.Mockito.verifyNoMoreInteractions; /** * Date: 12/29/15 - 10:50 PM * * @author Jeroen Meulemeester */ public class DragonSlayerTest { /** * Verify if the dragon slayer uses the strategy during battle */ @Test public void testGoToBattle() { final DragonSlayingStrategy strategy = mock(DragonSlayingStrategy.class); final DragonSlayer dragonSlayer = new DragonSlayer(strategy); dragonSlayer.goToBattle(); verify(strategy).execute(); verifyNoMoreInteractions(strategy); } /** * Verify if the dragon slayer uses the new strategy during battle after a change of strategy */ @Test public void testChangeStrategy() throws Exception { final DragonSlayingStrategy initialStrategy = mock(DragonSlayingStrategy.class); final DragonSlayer dragonSlayer = new DragonSlayer(initialStrategy); dragonSlayer.goToBattle(); verify(initialStrategy).execute(); final DragonSlayingStrategy newStrategy = mock(DragonSlayingStrategy.class); dragonSlayer.changeStrategy(newStrategy); dragonSlayer.goToBattle(); verify(newStrategy).execute(); verifyNoMoreInteractions(initialStrategy, newStrategy); } }DragonSlayingStrategyTest.java000066400000000000000000000052311264154357600342760ustar00rootroot00000000000000java-design-patterns-1.9.0/strategy/src/test/java/com/iluwatar/strategypackage com.iluwatar.strategy; import org.junit.After; import org.junit.Before; import org.junit.Test; import org.junit.runner.RunWith; import org.junit.runners.Parameterized; import java.io.PrintStream; import java.util.Arrays; import java.util.Collection; import static org.mockito.Mockito.mock; import static org.mockito.Mockito.verify; import static org.mockito.Mockito.verifyNoMoreInteractions; /** * Date: 12/29/15 - 10:58 PM * * @author Jeroen Meulemeester */ @RunWith(Parameterized.class) public class DragonSlayingStrategyTest { /** * @return The test parameters for each cycle */ @Parameterized.Parameters public static Collection data() { return Arrays.asList( new Object[]{ new MeleeStrategy(), "With your Excalibur you severe the dragon's head!" }, new Object[]{ new ProjectileStrategy(), "You shoot the dragon with the magical crossbow and it falls dead on the ground!" }, new Object[]{ new SpellStrategy(), "You cast the spell of disintegration and the dragon vaporizes in a pile of dust!" } ); } /** * The tested strategy */ private final DragonSlayingStrategy strategy; /** * The expected action on the std-out */ private final String expectedResult; /** * The mocked standard out {@link PrintStream}, required since some actions don't have any * influence on accessible objects, except for writing to std-out using {@link System#out} */ private final PrintStream stdOutMock = mock(PrintStream.class); /** * Keep the original std-out so it can be restored after the test */ private final PrintStream stdOutOrig = System.out; /** * Create a new test instance for the given strategy * * @param strategy The tested strategy * @param expectedResult The expected result */ public DragonSlayingStrategyTest(final DragonSlayingStrategy strategy, final String expectedResult) { this.strategy = strategy; this.expectedResult = expectedResult; } /** * Inject the mocked std-out {@link PrintStream} into the {@link System} class before each test */ @Before public void setUp() { System.setOut(this.stdOutMock); 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Template method lets subclasses redefine certain steps of an algorithm without changing the algorithm's structure. ![alt text](./etc/template-method_1.png "Template Method") **Applicability:** The Template Method pattern should be used * to implement the invariant parts of an algorithm once and leave it up to subclasses to implement the behavior that can vary * when common behavior among subclasses should be factored and localized in a common class to avoid code duplication. This is good example of "refactoring to generalize" as described by Opdyke and Johnson. You first identify the differences in the existing code and then separate the differences into new operations. Finally, you replace the differing code with a template method that calls one of these new operations * to control subclasses extensions. You can define a template method that calls "hook" operations at specific points, thereby permitting extensions only at those points **Credits** * [Design Patterns: Elements of Reusable Object-Oriented Software](http://www.amazon.com/Design-Patterns-Elements-Reusable-Object-Oriented/dp/0201633612) java-design-patterns-1.9.0/template-method/pom.xml000066400000000000000000000013761264154357600222010ustar00rootroot00000000000000 4.0.0 com.iluwatar java-design-patterns 1.9.0 template-method junit junit test org.mockito mockito-core test java-design-patterns-1.9.0/template-method/src/000077500000000000000000000000001264154357600214445ustar00rootroot00000000000000java-design-patterns-1.9.0/template-method/src/main/000077500000000000000000000000001264154357600223705ustar00rootroot00000000000000java-design-patterns-1.9.0/template-method/src/main/java/000077500000000000000000000000001264154357600233115ustar00rootroot00000000000000java-design-patterns-1.9.0/template-method/src/main/java/com/000077500000000000000000000000001264154357600240675ustar00rootroot00000000000000java-design-patterns-1.9.0/template-method/src/main/java/com/iluwatar/000077500000000000000000000000001264154357600257175ustar00rootroot00000000000000java-design-patterns-1.9.0/template-method/src/main/java/com/iluwatar/templatemethod/000077500000000000000000000000001264154357600307335ustar00rootroot00000000000000java-design-patterns-1.9.0/template-method/src/main/java/com/iluwatar/templatemethod/App.java000066400000000000000000000012351264154357600323170ustar00rootroot00000000000000package com.iluwatar.templatemethod; /** * * Template Method defines a skeleton for an algorithm. The algorithm subclasses provide * implementation for the blank parts. *

    * In this example {@link HalflingThief} contains {@link StealingMethod} that can be changed. First * the thief hits with {@link HitAndRunMethod} and then with {@link SubtleMethod}. * */ public class App { /** * Program entry point * * @param args command line args */ public static void main(String[] args) { HalflingThief thief = new HalflingThief(new HitAndRunMethod()); thief.steal(); thief.changeMethod(new SubtleMethod()); thief.steal(); } } HalflingThief.java000066400000000000000000000006021264154357600342210ustar00rootroot00000000000000java-design-patterns-1.9.0/template-method/src/main/java/com/iluwatar/templatemethodpackage com.iluwatar.templatemethod; /** * * Halfling thief uses {@link StealingMethod} to steal. * */ public class HalflingThief { private StealingMethod method; public HalflingThief(StealingMethod method) { this.method = method; } public void steal() { method.steal(); } public void changeMethod(StealingMethod method) { this.method = method; } } HitAndRunMethod.java000066400000000000000000000010001264154357600345030ustar00rootroot00000000000000java-design-patterns-1.9.0/template-method/src/main/java/com/iluwatar/templatemethodpackage com.iluwatar.templatemethod; /** * * HitAndRunMethod implementation of {@link StealingMethod}. * */ public class HitAndRunMethod extends StealingMethod { @Override protected String pickTarget() { return "old goblin woman"; } @Override protected void confuseTarget(String target) { System.out.println("Approach the " + target + " from behind."); } @Override protected void stealTheItem(String target) { System.out.println("Grab the handbag and run away fast!"); } } StealingMethod.java000066400000000000000000000010361264154357600344260ustar00rootroot00000000000000java-design-patterns-1.9.0/template-method/src/main/java/com/iluwatar/templatemethodpackage com.iluwatar.templatemethod; /** * * StealingMethod defines skeleton for the algorithm. * */ public abstract class StealingMethod { protected abstract String pickTarget(); protected abstract void confuseTarget(String target); protected abstract void stealTheItem(String target); /** * Steal */ public void steal() { String target = pickTarget(); System.out.println("The target has been chosen as " + target + "."); confuseTarget(target); stealTheItem(target); } } SubtleMethod.java000066400000000000000000000010351264154357600341150ustar00rootroot00000000000000java-design-patterns-1.9.0/template-method/src/main/java/com/iluwatar/templatemethodpackage com.iluwatar.templatemethod; /** * * SubtleMethod implementation of {@link StealingMethod}. * */ public class SubtleMethod extends StealingMethod { @Override protected String pickTarget() { return "shop keeper"; } @Override protected void confuseTarget(String target) { System.out.println("Approach the " + target + " with tears running and hug him!"); } @Override protected void stealTheItem(String target) { System.out.println("While in close contact grab the " + target + "'s wallet."); } } java-design-patterns-1.9.0/template-method/src/test/000077500000000000000000000000001264154357600224235ustar00rootroot00000000000000java-design-patterns-1.9.0/template-method/src/test/java/000077500000000000000000000000001264154357600233445ustar00rootroot00000000000000java-design-patterns-1.9.0/template-method/src/test/java/com/000077500000000000000000000000001264154357600241225ustar00rootroot00000000000000java-design-patterns-1.9.0/template-method/src/test/java/com/iluwatar/000077500000000000000000000000001264154357600257525ustar00rootroot00000000000000java-design-patterns-1.9.0/template-method/src/test/java/com/iluwatar/templatemethod/000077500000000000000000000000001264154357600307665ustar00rootroot00000000000000java-design-patterns-1.9.0/template-method/src/test/java/com/iluwatar/templatemethod/AppTest.java000066400000000000000000000003121264154357600332050ustar00rootroot00000000000000package com.iluwatar.templatemethod; import org.junit.Test; /** * * Application test * */ public class AppTest { @Test public void test() { String[] args = {}; App.main(args); } } HalflingThiefTest.java000066400000000000000000000022431264154357600351170ustar00rootroot00000000000000java-design-patterns-1.9.0/template-method/src/test/java/com/iluwatar/templatemethodpackage com.iluwatar.templatemethod; import org.junit.Test; import static org.mockito.Mockito.mock; import static org.mockito.Mockito.verify; import static org.mockito.Mockito.verifyNoMoreInteractions; /** * Date: 12/29/15 - 18:15 PM * * @author Jeroen Meulemeester */ public class HalflingThiefTest { /** * Verify if the thief uses the provided stealing method */ @Test public void testSteal() { final StealingMethod method = mock(StealingMethod.class); final HalflingThief thief = new HalflingThief(method); thief.steal(); verify(method).steal(); verifyNoMoreInteractions(method); } /** * Verify if the thief uses the provided stealing method, and the new method after changing it */ @Test public void testChangeMethod() { final StealingMethod initialMethod = mock(StealingMethod.class); final HalflingThief thief = new HalflingThief(initialMethod); thief.steal(); verify(initialMethod).steal(); final StealingMethod newMethod = mock(StealingMethod.class); thief.changeMethod(newMethod); thief.steal(); verify(newMethod).steal(); verifyNoMoreInteractions(initialMethod, newMethod); } }HitAndRunMethodTest.java000066400000000000000000000010231264154357600354030ustar00rootroot00000000000000java-design-patterns-1.9.0/template-method/src/test/java/com/iluwatar/templatemethodpackage com.iluwatar.templatemethod; /** * Date: 12/30/15 - 18:12 PM * * @author Jeroen Meulemeester */ public class HitAndRunMethodTest extends StealingMethodTest { /** * Create a new test for the {@link HitAndRunMethod} */ public HitAndRunMethodTest() { super( new HitAndRunMethod(), "old goblin woman", "The target has been chosen as old goblin woman.", "Approach the old goblin woman from behind.", "Grab the handbag and run away fast!" ); } }StealingMethodTest.java000066400000000000000000000075071264154357600353320ustar00rootroot00000000000000java-design-patterns-1.9.0/template-method/src/test/java/com/iluwatar/templatemethodpackage com.iluwatar.templatemethod; import org.junit.After; import org.junit.Before; import org.junit.Test; import org.mockito.InOrder; import java.io.PrintStream; import static org.junit.Assert.assertEquals; import static org.mockito.Mockito.inOrder; import static org.mockito.Mockito.mock; import static org.mockito.Mockito.verify; import static org.mockito.Mockito.verifyNoMoreInteractions; import static org.mockito.Mockito.verifyZeroInteractions; /** * Date: 12/30/15 - 18:12 PM * * @author Jeroen Meulemeester */ public abstract class StealingMethodTest { /** * The tested stealing method */ private final M method; /** * The expected target */ private final String expectedTarget; /** * The expected target picking result */ private final String expectedTargetResult; /** * The expected confusion method */ private final String expectedConfuseMethod; /** * The expected stealing method */ private final String expectedStealMethod; /** * The mocked standard out {@link PrintStream}, required since some actions don't have any * influence on accessible objects, except for writing to std-out using {@link System#out} */ private final PrintStream stdOutMock = mock(PrintStream.class); /** * Keep the original std-out so it can be restored after the test */ private final PrintStream stdOutOrig = System.out; /** * Create a new test for the given stealing method, together with the expected results * * @param method The tested stealing method * @param expectedTarget The expected target name * @param expectedTargetResult The expected target picking result * @param expectedConfuseMethod The expected confusion method * @param expectedStealMethod The expected stealing method */ public StealingMethodTest(final M method, String expectedTarget, final String expectedTargetResult, final String expectedConfuseMethod, final String expectedStealMethod) { this.method = method; this.expectedTarget = expectedTarget; this.expectedTargetResult = expectedTargetResult; this.expectedConfuseMethod = expectedConfuseMethod; this.expectedStealMethod = expectedStealMethod; } /** * Inject the mocked std-out {@link PrintStream} into the {@link System} class before each test */ @Before public void setUp() { System.setOut(this.stdOutMock); } /** * Removed the mocked std-out {@link PrintStream} again from the {@link System} class */ @After public void tearDown() { System.setOut(this.stdOutOrig); } /** * Verify if the thief picks the correct target */ @Test public void testPickTarget() { assertEquals(expectedTarget, this.method.pickTarget()); } /** * Verify if the target confusing step goes as planned */ @Test public void testConfuseTarget() { verifyZeroInteractions(this.stdOutMock); this.method.confuseTarget(this.expectedTarget); verify(this.stdOutMock).println(this.expectedConfuseMethod); verifyNoMoreInteractions(this.stdOutMock); } /** * Verify if the stealing step goes as planned */ @Test public void testStealTheItem() { verifyZeroInteractions(this.stdOutMock); this.method.stealTheItem(this.expectedTarget); verify(this.stdOutMock).println(this.expectedStealMethod); verifyNoMoreInteractions(this.stdOutMock); } /** * Verify if the complete steal process goes as planned */ @Test public void testSteal() { final InOrder inOrder = inOrder(this.stdOutMock); this.method.steal(); inOrder.verify(this.stdOutMock).println(this.expectedTargetResult); inOrder.verify(this.stdOutMock).println(this.expectedConfuseMethod); inOrder.verify(this.stdOutMock).println(this.expectedStealMethod); inOrder.verifyNoMoreInteractions(); } }SubtleMethodTest.java000066400000000000000000000010321264154357600350050ustar00rootroot00000000000000java-design-patterns-1.9.0/template-method/src/test/java/com/iluwatar/templatemethodpackage com.iluwatar.templatemethod; /** * Date: 12/30/15 - 18:19 PM * * @author Jeroen Meulemeester */ public class SubtleMethodTest extends StealingMethodTest { /** * Create a new test for the {@link SubtleMethod} */ public SubtleMethodTest() { super( new SubtleMethod(), "shop keeper", "The target has been chosen as shop keeper.", "Approach the shop keeper with tears running and hug him!", "While in close contact grab the shop keeper's wallet." ); } }java-design-patterns-1.9.0/thread-pool/000077500000000000000000000000001264154357600200025ustar00rootroot00000000000000java-design-patterns-1.9.0/thread-pool/etc/000077500000000000000000000000001264154357600205555ustar00rootroot00000000000000java-design-patterns-1.9.0/thread-pool/etc/thread-pool.png000066400000000000000000000347141264154357600235120ustar00rootroot00000000000000PNG  IHDRs*f9IDATx_Uw^%ڋ 7&jBK㟲)!mR8RXV %n(S-Zix*Н@Ыn% G( d_kz֬''sffϬ=ϳ{5LhuA,⁲رrv(L̿h_v@Y,( er;,P`\nG1ʲx1/BY=*z{ #hA$I>MɇDJʕao+u"j=v+v(FLz}̖k1n8NZDUC,}.CPQVLЦ` >ʢyLwU?</7ʕ7,O17à,=.#ՠ,=.e&v@Y,( er;,P`\nLȯ,g^][x`K?ٰ^,Xr;r*0A;[xl=[T[$Ɠ<LM)( p.#0NO?]zh]ܶ@Jq'w:D-Pr;uyXk;OyJ:=5Z.qȟud4ӎPHr;ڇvp,==ɖe[pU$jxk5[4Dsb YF3 ^Yv t A,geY{`-v{{G3 lJ+~grFa"a/iQO%T,CD#r;uvV޽ig. _g}/^"?$%W|)v(Z1i&W=<>ۑwv}W3ǟ8{r̵Y+^*vx;JP.I' Xts)@Yz\n|ѝm2<Ƌ?6 ^_>n}M[H>W$ ~(IY! 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Creating a new thread for each task would make the system spend more time creating and destroying the threads than executing the actual tasks. Thread Pool solves this problem by reusing existing threads and eliminating the latency of creating new threads. ![alt text](./etc/thread-pool.png "Thread Pool") **Applicability:** Use the Thread Pool pattern when * you have a large number of short-lived tasks to be executed in parallel java-design-patterns-1.9.0/thread-pool/pom.xml000066400000000000000000000013721264154357600213220ustar00rootroot00000000000000 4.0.0 com.iluwatar java-design-patterns 1.9.0 thread-pool junit junit test org.mockito mockito-core test java-design-patterns-1.9.0/thread-pool/src/000077500000000000000000000000001264154357600205715ustar00rootroot00000000000000java-design-patterns-1.9.0/thread-pool/src/main/000077500000000000000000000000001264154357600215155ustar00rootroot00000000000000java-design-patterns-1.9.0/thread-pool/src/main/java/000077500000000000000000000000001264154357600224365ustar00rootroot00000000000000java-design-patterns-1.9.0/thread-pool/src/main/java/com/000077500000000000000000000000001264154357600232145ustar00rootroot00000000000000java-design-patterns-1.9.0/thread-pool/src/main/java/com/iluwatar/000077500000000000000000000000001264154357600250445ustar00rootroot00000000000000java-design-patterns-1.9.0/thread-pool/src/main/java/com/iluwatar/threadpool/000077500000000000000000000000001264154357600272055ustar00rootroot00000000000000java-design-patterns-1.9.0/thread-pool/src/main/java/com/iluwatar/threadpool/App.java000066400000000000000000000052331264154357600305730ustar00rootroot00000000000000package com.iluwatar.threadpool; import java.util.ArrayList; import java.util.List; import java.util.concurrent.ExecutorService; import java.util.concurrent.Executors; /** * * Thread Pool pattern is where a number of threads are created to perform a number of tasks, which * are usually organized in a queue. The results from the tasks being executed might also be placed * in a queue, or the tasks might return no result. Typically, there are many more tasks than * threads. As soon as a thread completes its task, it will request the next task from the queue * until all tasks have been completed. The thread can then terminate, or sleep until there are new * tasks available. *

    * In this example we create a list of tasks presenting work to be done. Each task is then wrapped * into a {@link Worker} object that implements {@link Runnable}. We create an * {@link ExecutorService} with fixed number of threads (Thread Pool) and use them to execute the * {@link Worker}s. * */ public class App { /** * Program entry point * * @param args command line args */ public static void main(String[] args) { System.out.println("Program started"); // Create a list of tasks to be executed List tasks = new ArrayList<>(); tasks.add(new PotatoPeelingTask(3)); tasks.add(new PotatoPeelingTask(6)); tasks.add(new CoffeeMakingTask(2)); tasks.add(new CoffeeMakingTask(6)); tasks.add(new PotatoPeelingTask(4)); tasks.add(new CoffeeMakingTask(2)); tasks.add(new PotatoPeelingTask(4)); tasks.add(new CoffeeMakingTask(9)); tasks.add(new PotatoPeelingTask(3)); tasks.add(new CoffeeMakingTask(2)); tasks.add(new PotatoPeelingTask(4)); tasks.add(new CoffeeMakingTask(2)); tasks.add(new CoffeeMakingTask(7)); tasks.add(new PotatoPeelingTask(4)); tasks.add(new PotatoPeelingTask(5)); // Creates a thread pool that reuses a fixed number of threads operating off a shared // unbounded queue. At any point, at most nThreads threads will be active processing // tasks. If additional tasks are submitted when all threads are active, they will wait // in the queue until a thread is available. ExecutorService executor = Executors.newFixedThreadPool(3); // Allocate new worker for each task // The worker is executed when a thread becomes // available in the thread pool for (int i = 0; i < tasks.size(); i++) { Runnable worker = new Worker(tasks.get(i)); executor.execute(worker); } // All tasks were executed, now shutdown executor.shutdown(); while (!executor.isTerminated()) { Thread.yield(); } System.out.println("Program finished"); } } java-design-patterns-1.9.0/thread-pool/src/main/java/com/iluwatar/threadpool/CoffeeMakingTask.java000066400000000000000000000006151264154357600332130ustar00rootroot00000000000000package com.iluwatar.threadpool; /** * * CoffeeMakingTask is a concrete task * */ public class CoffeeMakingTask extends Task { private static final int TIME_PER_CUP = 100; public CoffeeMakingTask(int numCups) { super(numCups * TIME_PER_CUP); } @Override public String toString() { return String.format("%s %s", this.getClass().getSimpleName(), super.toString()); } } java-design-patterns-1.9.0/thread-pool/src/main/java/com/iluwatar/threadpool/PotatoPeelingTask.java000066400000000000000000000006351264154357600334510ustar00rootroot00000000000000package com.iluwatar.threadpool; /** * * PotatoPeelingTask is a concrete task * */ public class PotatoPeelingTask extends Task { private static final int TIME_PER_POTATO = 200; public PotatoPeelingTask(int numPotatoes) { super(numPotatoes * TIME_PER_POTATO); } @Override public String toString() { return String.format("%s %s", this.getClass().getSimpleName(), super.toString()); } } java-design-patterns-1.9.0/thread-pool/src/main/java/com/iluwatar/threadpool/Task.java000066400000000000000000000011261264154357600307520ustar00rootroot00000000000000package com.iluwatar.threadpool; import java.util.concurrent.atomic.AtomicInteger; /** * * Abstract base class for tasks * */ public abstract class Task { private static final AtomicInteger ID_GENERATOR = new AtomicInteger(); private final int id; private final int timeMs; public Task(final int timeMs) { this.id = ID_GENERATOR.incrementAndGet(); this.timeMs = timeMs; } public int getId() { return id; } public int getTimeMs() { return timeMs; } @Override public String toString() { return String.format("id=%d timeMs=%d", id, timeMs); } } java-design-patterns-1.9.0/thread-pool/src/main/java/com/iluwatar/threadpool/Worker.java000066400000000000000000000010461264154357600313220ustar00rootroot00000000000000package com.iluwatar.threadpool; /** * * Worker implements {@link Runnable} and thus can be executed by {@link ExecutorService} * */ public class Worker implements Runnable { private final Task task; public Worker(final Task task) { this.task = task; } @Override public void run() { System.out.println(String.format("%s processing %s", Thread.currentThread().getName(), task.toString())); try { Thread.sleep(task.getTimeMs()); } catch (InterruptedException e) { e.printStackTrace(); } } } java-design-patterns-1.9.0/thread-pool/src/test/000077500000000000000000000000001264154357600215505ustar00rootroot00000000000000java-design-patterns-1.9.0/thread-pool/src/test/java/000077500000000000000000000000001264154357600224715ustar00rootroot00000000000000java-design-patterns-1.9.0/thread-pool/src/test/java/com/000077500000000000000000000000001264154357600232475ustar00rootroot00000000000000java-design-patterns-1.9.0/thread-pool/src/test/java/com/iluwatar/000077500000000000000000000000001264154357600250775ustar00rootroot00000000000000java-design-patterns-1.9.0/thread-pool/src/test/java/com/iluwatar/threadpool/000077500000000000000000000000001264154357600272405ustar00rootroot00000000000000java-design-patterns-1.9.0/thread-pool/src/test/java/com/iluwatar/threadpool/AppTest.java000066400000000000000000000003271264154357600314650ustar00rootroot00000000000000package com.iluwatar.threadpool; import org.junit.Test; /** * Application test * * @author ilkka * */ public class AppTest { @Test public void test() { String[] args = {}; App.main(args); } } CoffeeMakingTaskTest.java000066400000000000000000000004551264154357600340310ustar00rootroot00000000000000java-design-patterns-1.9.0/thread-pool/src/test/java/com/iluwatar/threadpoolpackage com.iluwatar.threadpool; /** * Date: 12/30/15 - 18:23 PM * * @author Jeroen Meulemeester */ public class CoffeeMakingTaskTest extends TaskTest { /** * Create a new test instance */ public CoffeeMakingTaskTest() { super(CoffeeMakingTask::new, 100); } } PotatoPeelingTaskTest.java000066400000000000000000000004601264154357600342610ustar00rootroot00000000000000java-design-patterns-1.9.0/thread-pool/src/test/java/com/iluwatar/threadpoolpackage com.iluwatar.threadpool; /** * Date: 12/30/15 - 18:23 PM * * @author Jeroen Meulemeester */ public class PotatoPeelingTaskTest extends TaskTest { /** * Create a new test instance */ public PotatoPeelingTaskTest() { super(PotatoPeelingTask::new, 200); } }java-design-patterns-1.9.0/thread-pool/src/test/java/com/iluwatar/threadpool/TaskTest.java000066400000000000000000000063221264154357600316500ustar00rootroot00000000000000package com.iluwatar.threadpool; import org.junit.Test; import java.util.ArrayList; import java.util.List; import java.util.Objects; import java.util.concurrent.Callable; import java.util.concurrent.ExecutionException; import java.util.concurrent.ExecutorService; import java.util.concurrent.Executors; import java.util.concurrent.Future; import java.util.function.Function; import java.util.stream.Collectors; import static org.junit.Assert.assertEquals; import static org.junit.Assert.assertNotNull; /** * Date: 12/30/15 - 18:22 PM * * @author Jeroen Meulemeester */ public abstract class TaskTest { /** * The number of tasks used during the concurrency test */ private static final int TASK_COUNT = 128 * 1024; /** * The number of threads used during the concurrency test */ private static final int THREAD_COUNT = 8; /** * The task factory, used to create new test items */ private final Function factory; /** * The expected time needed to run the task 1 single time, in milli seconds */ private final int expectedExecutionTime; /** * Create a new test instance * * @param factory The task factory, used to create new test items * @param expectedExecutionTime The expected time needed to run the task 1 time, in milli seconds */ public TaskTest(final Function factory, final int expectedExecutionTime) { this.factory = factory; this.expectedExecutionTime = expectedExecutionTime; } /** * Verify if the generated id is unique for each task, even if the tasks are created in separate * threads */ @Test(timeout = 10000) public void testIdGeneration() throws Exception { final ExecutorService service = Executors.newFixedThreadPool(THREAD_COUNT); final List> tasks = new ArrayList<>(); for (int i = 0; i < TASK_COUNT; i++) { tasks.add(() -> factory.apply(1).getId()); } final List ids = service.invokeAll(tasks) .stream() .map(TaskTest::get) .filter(Objects::nonNull) .collect(Collectors.toList()); service.shutdownNow(); final long uniqueIdCount = ids.stream() .distinct() .count(); assertEquals(TASK_COUNT, ids.size()); assertEquals(TASK_COUNT, uniqueIdCount); } /** * Verify if the time per execution of a task matches the actual time required to execute the task * a given number of times */ @Test public void testTimeMs() { for (int i = 0; i < 10; i++) { assertEquals(this.expectedExecutionTime * i, this.factory.apply(i).getTimeMs()); } } /** * Verify if the task has some sort of {@link T#toString()}, different from 'null' */ @Test public void testToString() { assertNotNull(this.factory.apply(0).toString()); } /** * Extract the result from a future or returns 'null' when an exception occurred * * @param future The future we want the result from * @param The result type * @return The result or 'null' when a checked exception occurred */ private static O get(Future future) { try { return future.get(); } catch (InterruptedException | ExecutionException e) { return null; } } }java-design-patterns-1.9.0/thread-pool/src/test/java/com/iluwatar/threadpool/WorkerTest.java000066400000000000000000000012201264154357600322070ustar00rootroot00000000000000package com.iluwatar.threadpool; import org.junit.Test; import static org.mockito.Mockito.mock; import static org.mockito.Mockito.verify; import static org.mockito.Mockito.verifyNoMoreInteractions; import static org.mockito.Mockito.verifyZeroInteractions; /** * Date: 12/30/15 - 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'*bJAÉJ@ D@lRpR 6P)a8Q)T*o0Qnީˆ澿ٸ5ff,2ݍ T*9Rj Tj ݢ&UQ  Jte_GG!rȤ763ޞ[gDxLhKdJpTcX#'J[E&4XG *8*kD R0R 6Rwm]gd3./j uZ朖]wUr=/:/-D@l,RңadR 6Rg#f^#dv E,]Tp HdX۟p͝vW{ĝl8,R 63DmݡllJv nU5*5Q*hI:; {”Jpԟ^z?|;8'Zl*81(g[Fz! f--峂'*báR~=çāWz.ǭR#.)vI kRFԆ18/{=uKRDT+EO(ٚd=G6ȹqKdvbD@lT~cOI6cߢjꦲOL݊X|}k;+d|Ycqz?1ɖ sC3P#S" *WqTCTqxTMd Q)6ONcſr& ƕ~Wj7]Ww/Ʉaupg_4XףZիFy)JL0VKQ/-5TnK i)K J'>O_8fkHg5cEfQE<˕W~ q c+S V)y6.+#RrT!*J-icTZWܴRLgq)c) 1b\jPD@l8TJ3Ltq` YgZ1PT V7#m)aRH[6ϖ~V"zuܦmk=9l۔uyv(R)  J(jRc>zaJ5ji쨜)1bJ5S{ٍu-ftQ)0 T BNT 2*W/c'*b#\R 6U) 02Q)kS_ java-design-patterns-1.9.0/tolerant-reader/index.md000066400000000000000000000013511264154357600223050ustar00rootroot00000000000000--- layout: pattern title: Tolerant Reader folder: tolerant-reader permalink: /patterns/tolerant-reader/ categories: Integration tags: - Java - Difficulty-Beginner --- **Intent:** Tolerant Reader is an integration pattern that helps creating robust communication systems. The idea is to be as tolerant as possible when reading data from another service. This way, when the communication schema changes, the readers must not break. ![alt text](./etc/tolerant-reader.png "Tolerant Reader") **Applicability:** Use the Tolerant Reader pattern when * the communication schema can evolve and change and yet the receiving side should not break **Credits:** * [Martin Fowler - Tolerant Reader](http://martinfowler.com/bliki/TolerantReader.html) java-design-patterns-1.9.0/tolerant-reader/pom.xml000066400000000000000000000011601264154357600221670ustar00rootroot00000000000000 4.0.0 com.iluwatar java-design-patterns 1.9.0 tolerant-reader junit junit test java-design-patterns-1.9.0/tolerant-reader/src/000077500000000000000000000000001264154357600214435ustar00rootroot00000000000000java-design-patterns-1.9.0/tolerant-reader/src/main/000077500000000000000000000000001264154357600223675ustar00rootroot00000000000000java-design-patterns-1.9.0/tolerant-reader/src/main/java/000077500000000000000000000000001264154357600233105ustar00rootroot00000000000000java-design-patterns-1.9.0/tolerant-reader/src/main/java/com/000077500000000000000000000000001264154357600240665ustar00rootroot00000000000000java-design-patterns-1.9.0/tolerant-reader/src/main/java/com/iluwatar/000077500000000000000000000000001264154357600257165ustar00rootroot00000000000000java-design-patterns-1.9.0/tolerant-reader/src/main/java/com/iluwatar/tolerantreader/000077500000000000000000000000001264154357600307315ustar00rootroot00000000000000java-design-patterns-1.9.0/tolerant-reader/src/main/java/com/iluwatar/tolerantreader/App.java000066400000000000000000000050641264154357600323210ustar00rootroot00000000000000package com.iluwatar.tolerantreader; import java.io.IOException; /** * * Tolerant Reader is an integration pattern that helps creating robust communication systems. The * idea is to be as tolerant as possible when reading data from another service. This way, when the * communication schema changes, the readers must not break. *

    * In this example we use Java serialization to write representations of {@link RainbowFish} objects * to file. {@link RainbowFish} is the initial version which we can easily read and write using * {@link RainbowFishSerializer} methods. {@link RainbowFish} then evolves to {@link RainbowFishV2} * and we again write it to file with a method designed to do just that. However, the reader client * does not know about the new format and still reads with the method designed for V1 schema. * Fortunately the reading method has been designed with the Tolerant Reader pattern and does not * break even though {@link RainbowFishV2} has new fields that are serialized. * */ public class App { /** * Program entry point */ public static void main(String[] args) throws IOException, ClassNotFoundException { // Write V1 RainbowFish fishV1 = new RainbowFish("Zed", 10, 11, 12); System.out.println(String.format("fishV1 name=%s age=%d length=%d weight=%d", fishV1.getName(), fishV1.getAge(), fishV1.getLengthMeters(), fishV1.getWeightTons())); RainbowFishSerializer.writeV1(fishV1, "fish1.out"); // Read V1 RainbowFish deserializedFishV1 = RainbowFishSerializer.readV1("fish1.out"); System.out.println(String.format("deserializedFishV1 name=%s age=%d length=%d weight=%d", deserializedFishV1.getName(), deserializedFishV1.getAge(), deserializedFishV1.getLengthMeters(), deserializedFishV1.getWeightTons())); // Write V2 RainbowFishV2 fishV2 = new RainbowFishV2("Scar", 5, 12, 15, true, true, true); System.out.println(String.format( "fishV2 name=%s age=%d length=%d weight=%d sleeping=%b hungry=%b angry=%b", fishV2.getName(), fishV2.getAge(), fishV2.getLengthMeters(), fishV2.getWeightTons(), fishV2.getHungry(), fishV2.getAngry(), fishV2.getSleeping())); RainbowFishSerializer.writeV2(fishV2, "fish2.out"); // Read V2 with V1 method RainbowFish deserializedFishV2 = RainbowFishSerializer.readV1("fish2.out"); System.out.println(String.format("deserializedFishV2 name=%s age=%d length=%d weight=%d", deserializedFishV2.getName(), deserializedFishV2.getAge(), deserializedFishV2.getLengthMeters(), deserializedFishV2.getWeightTons())); } } RainbowFish.java000066400000000000000000000013771264154357600337400ustar00rootroot00000000000000java-design-patterns-1.9.0/tolerant-reader/src/main/java/com/iluwatar/tolerantreaderpackage com.iluwatar.tolerantreader; import java.io.Serializable; /** * * RainbowFish is the initial schema * */ public class RainbowFish implements Serializable { private static final long serialVersionUID = 1L; private String name; private int age; private int lengthMeters; private int weightTons; /** * Constructor */ public RainbowFish(String name, int age, int lengthMeters, int weightTons) { this.name = name; this.age = age; this.lengthMeters = lengthMeters; this.weightTons = weightTons; } public String getName() { return name; } public int getAge() { return age; } public int getLengthMeters() { return lengthMeters; } public int getWeightTons() { return weightTons; } } RainbowFishSerializer.java000066400000000000000000000052241264154357600357650ustar00rootroot00000000000000java-design-patterns-1.9.0/tolerant-reader/src/main/java/com/iluwatar/tolerantreaderpackage com.iluwatar.tolerantreader; import java.io.FileInputStream; import java.io.FileOutputStream; import java.io.IOException; import java.io.ObjectInputStream; import java.io.ObjectOutputStream; import java.util.HashMap; import java.util.Map; /** * * RainbowFishSerializer provides methods for reading and writing {@link RainbowFish} objects to * file. Tolerant Reader pattern is implemented here by serializing maps instead of * {@link RainbowFish} objects. This way the reader does not break even though new properties are * added to the schema. * */ public class RainbowFishSerializer { private RainbowFishSerializer() { } /** * Write V1 RainbowFish to file */ public static void writeV1(RainbowFish rainbowFish, String filename) throws IOException { Map map = new HashMap<>(); map.put("name", rainbowFish.getName()); map.put("age", String.format("%d", rainbowFish.getAge())); map.put("lengthMeters", String.format("%d", rainbowFish.getLengthMeters())); map.put("weightTons", String.format("%d", rainbowFish.getWeightTons())); FileOutputStream fileOut = new FileOutputStream(filename); ObjectOutputStream objOut = new ObjectOutputStream(fileOut); objOut.writeObject(map); objOut.close(); fileOut.close(); } /** * Write V2 RainbowFish to file */ public static void writeV2(RainbowFishV2 rainbowFish, String filename) throws IOException { Map map = new HashMap<>(); map.put("name", rainbowFish.getName()); map.put("age", String.format("%d", rainbowFish.getAge())); map.put("lengthMeters", String.format("%d", rainbowFish.getLengthMeters())); map.put("weightTons", String.format("%d", rainbowFish.getWeightTons())); map.put("angry", Boolean.toString(rainbowFish.getAngry())); map.put("hungry", Boolean.toString(rainbowFish.getHungry())); map.put("sleeping", Boolean.toString(rainbowFish.getSleeping())); FileOutputStream fileOut = new FileOutputStream(filename); ObjectOutputStream objOut = new ObjectOutputStream(fileOut); objOut.writeObject(map); objOut.close(); fileOut.close(); } /** * Read V1 RainbowFish from file */ public static RainbowFish readV1(String filename) throws IOException, ClassNotFoundException { FileInputStream fileIn = new FileInputStream(filename); ObjectInputStream objIn = new ObjectInputStream(fileIn); Map map = (Map) objIn.readObject(); objIn.close(); fileIn.close(); return new RainbowFish(map.get("name"), Integer.parseInt(map.get("age")), Integer.parseInt(map .get("lengthMeters")), Integer.parseInt(map.get("weightTons"))); } } RainbowFishV2.java000066400000000000000000000015511264154357600341420ustar00rootroot00000000000000java-design-patterns-1.9.0/tolerant-reader/src/main/java/com/iluwatar/tolerantreaderpackage com.iluwatar.tolerantreader; /** * * RainbowFishV2 is the evolved schema * */ public class RainbowFishV2 extends RainbowFish { private static final long serialVersionUID = 1L; private boolean sleeping; private boolean hungry; private boolean angry; public RainbowFishV2(String name, int age, int lengthMeters, int weightTons) { super(name, age, lengthMeters, weightTons); } /** * Constructor */ public RainbowFishV2(String name, int age, int lengthMeters, int weightTons, boolean sleeping, boolean hungry, boolean angry) { this(name, age, lengthMeters, weightTons); this.sleeping = sleeping; this.hungry = hungry; this.angry = angry; } public boolean getSleeping() { return sleeping; } public boolean getHungry() { return hungry; } public boolean getAngry() { return angry; } } java-design-patterns-1.9.0/tolerant-reader/src/test/000077500000000000000000000000001264154357600224225ustar00rootroot00000000000000java-design-patterns-1.9.0/tolerant-reader/src/test/java/000077500000000000000000000000001264154357600233435ustar00rootroot00000000000000java-design-patterns-1.9.0/tolerant-reader/src/test/java/com/000077500000000000000000000000001264154357600241215ustar00rootroot00000000000000java-design-patterns-1.9.0/tolerant-reader/src/test/java/com/iluwatar/000077500000000000000000000000001264154357600257515ustar00rootroot00000000000000java-design-patterns-1.9.0/tolerant-reader/src/test/java/com/iluwatar/tolerantreader/000077500000000000000000000000001264154357600307645ustar00rootroot00000000000000java-design-patterns-1.9.0/tolerant-reader/src/test/java/com/iluwatar/tolerantreader/AppTest.java000066400000000000000000000010021264154357600332000ustar00rootroot00000000000000package com.iluwatar.tolerantreader; import org.junit.After; import org.junit.Before; import org.junit.Test; import java.io.File; import java.io.IOException; /** * * Application test * */ public class AppTest { @Test public void test() throws ClassNotFoundException, IOException { String[] args = {}; App.main(args); } @Before @After public void cleanup() { File file1 = new File("fish1.out"); file1.delete(); File file2 = new File("fish2.out"); file2.delete(); } } RainbowFishSerializerTest.java000066400000000000000000000037401264154357600366610ustar00rootroot00000000000000java-design-patterns-1.9.0/tolerant-reader/src/test/java/com/iluwatar/tolerantreaderpackage com.iluwatar.tolerantreader; import org.junit.Rule; import org.junit.Test; import org.junit.rules.TemporaryFolder; import java.io.File; import static org.junit.Assert.assertEquals; import static org.junit.Assert.assertNotSame; /** * Date: 12/30/15 - 18:39 PM * * @author Jeroen Meulemeester */ public class RainbowFishSerializerTest { /** * Create a temporary folder, used to generate files in during this test */ @Rule public final TemporaryFolder testFolder = new TemporaryFolder(); /** * Rainbow fish version 1 used during the tests */ private static final RainbowFish V1 = new RainbowFish("version1", 1, 2, 3); /** * Rainbow fish version 2 used during the tests */ private static final RainbowFishV2 V2 = new RainbowFishV2("version2", 4, 5, 6, true, false, true); /** * Verify if a fish, written as version 1 can be read back as version 1 */ @Test public void testWriteV1ReadV1() throws Exception { final File outputFile = this.testFolder.newFile(); RainbowFishSerializer.writeV1(V1, outputFile.getPath()); final RainbowFish fish = RainbowFishSerializer.readV1(outputFile.getPath()); assertNotSame(V1, fish); assertEquals(V1.getName(), fish.getName()); assertEquals(V1.getAge(), fish.getAge()); assertEquals(V1.getLengthMeters(), fish.getLengthMeters()); assertEquals(V1.getWeightTons(), fish.getWeightTons()); } /** * Verify if a fish, written as version 2 can be read back as version 1 */ @Test public void testWriteV2ReadV1() throws Exception { final File outputFile = this.testFolder.newFile(); RainbowFishSerializer.writeV2(V2, outputFile.getPath()); final RainbowFish fish = RainbowFishSerializer.readV1(outputFile.getPath()); assertNotSame(V2, fish); assertEquals(V2.getName(), fish.getName()); assertEquals(V2.getAge(), fish.getAge()); assertEquals(V2.getLengthMeters(), fish.getLengthMeters()); assertEquals(V2.getWeightTons(), fish.getWeightTons()); } }RainbowFishTest.java000066400000000000000000000010761264154357600346270ustar00rootroot00000000000000java-design-patterns-1.9.0/tolerant-reader/src/test/java/com/iluwatar/tolerantreaderpackage com.iluwatar.tolerantreader; import org.junit.Test; import static org.junit.Assert.assertEquals; /** * Date: 12/30/15 - 18:34 PM * * @author Jeroen Meulemeester */ public class RainbowFishTest { /** * Verify if the getters of a {@link RainbowFish} return the expected values */ @Test public void testValues() { final RainbowFish fish = new RainbowFish("name", 1, 2, 3); assertEquals("name", fish.getName()); assertEquals(1, fish.getAge()); assertEquals(2, fish.getLengthMeters()); assertEquals(3, fish.getWeightTons()); } }RainbowFishV2Test.java000066400000000000000000000013311264154357600350310ustar00rootroot00000000000000java-design-patterns-1.9.0/tolerant-reader/src/test/java/com/iluwatar/tolerantreaderpackage com.iluwatar.tolerantreader; import org.junit.Test; import static org.junit.Assert.assertEquals; /** * Date: 12/30/15 - 18:35 PM * * @author Jeroen Meulemeester */ public class RainbowFishV2Test { /** * Verify if the getters of a {@link RainbowFish} return the expected values */ @Test public void testValues() { final RainbowFishV2 fish = new RainbowFishV2("name", 1, 2, 3, false, true, false); assertEquals("name", fish.getName()); assertEquals(1, fish.getAge()); assertEquals(2, fish.getLengthMeters()); assertEquals(3, fish.getWeightTons()); assertEquals(false, fish.getSleeping()); assertEquals(true, fish.getHungry()); assertEquals(false, fish.getAngry()); } }java-design-patterns-1.9.0/twin/000077500000000000000000000000001264154357600165455ustar00rootroot00000000000000java-design-patterns-1.9.0/twin/.gitignore000066400000000000000000000000111264154357600205250ustar00rootroot00000000000000/target/ java-design-patterns-1.9.0/twin/etc/000077500000000000000000000000001264154357600173205ustar00rootroot00000000000000java-design-patterns-1.9.0/twin/etc/twin.png000066400000000000000000000717621264154357600210240ustar00rootroot00000000000000PNG  IHDR:`sIDATx]XVр (" VVl#(b+bE {ATBN[5VTd7fsr{q{gvvfvvgogAO H A:ϟ@ N!qPҝBALT I ALT I AK|yDuf:*BC8/U`f橩ST\6ۇxt͚4~CRgAE:|r3gbG}x>{vwR<=ޝCϞ )d$u&TsZZ…#}|߼ Vcc'WRHڵlR-LFF<9\jy+'bV<i֭S9ɔ`2Ə.l-]Lo^K@&sTTlɓQyt:ARgAE:3^l$4E:o$Y3  ᇦĶi"A)S Ud=̷$c<稄f*N6FoHL }VgIL RgZHL RgZHL RgZHL RgZHL }UgĄxM yu>}TK6s?8IK+i$u&Tns%C1"k83SkǻwYf~|+47I  i3cɻ/H|1ƞZWڵQw 8Vhhoy5k&hI |)XBrJlZQzr\e3۷`iϷw<ճuz;wFxѢ8ܹzy@RgAE:/vOVqҼ39/[֦P!|!waٲlȑ5n\J"_Jtqqslgg]j/lԨmqք;6+YG73E\;wp qq(y8'3"tUwZsrj~1Y+#~{DHm[8NW ︢EMml E$>>Q(IgȨq/\ʼpa==K" [m*ep.-F77˗7ˢ4~I {vMWn'V!ްa*:qyyg+(s8_|eHL ]UgMf{FNfwןqq`Hço߾1Nyh_>)??soР:LZ۷8F1Ecf~?>kbo$3kw^&3'6;p[$J˒4~I ": J{ ?r5u /ߧ^iEN'8gPNŋ gD;ej#rieeÇ_E …_b,ڨQ 'E=v8 6 K'u&Χ/r۬~_{|?iY={O] B.yۻwK(T(==̙ߋL@-XܔdJ)qa"|yÉ޽Kq!z\㝽Ei+IRgAE:9Orw_нoI3/ݣ^İ˔˫k5sN ,^z5x, /n^@~h+ݡƒu\b n.&9"+V,@ ̦(y8 3"tX9@LvﴢUE/ˆ"͌оfH}x{E${ʔHPnDFE",ԙ@P>{.EEu?TĬ>,ԙ@P:'}Zpa]zzjppWO]LIYsܱF+W.77޽3u޹s6[͛$=~G\,[ÄnZwV#D$[ݺ)/^βkHT%|b"PTWD9kNuI 3*ۣB :3'qRUNeN>2-[ªU+@r~g6x \J9&L背QP4?w.vǎYd5Uɛò6ou j^V.ԙ@P:ΣGI{8]pUo 96Oŋb|u~63qذ,APyy5\]HeO,X8άڙUFuau޿_sukרQ~c{qu,-~t2bdV0{}y|,SgN͚8ѰauիD&hyPt^.nĂ̪ML 2tXޝ:yԚuqq`Gʕ+}Otvva M,ps疜-755q㚰 XZZ"ewO,X83@̘#l2"2?> ;7KǏw fgyu&j'I ALT I ALT I ALT I ALT I ʟ? 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    * In this example, the essence of the Twin pattern is the {@link BallItem} class and * {@link BallThread} class represent the twin objects to coordinate with each other(via the twin * reference) like a single class inheriting from {@link GameItem} and {@link Thread}. */ public class App { /** * Program entry point * * @param args command line args */ public static void main(String[] args) throws Exception { BallItem ballItem = new BallItem(); BallThread ballThread = new BallThread(); ballItem.setTwin(ballThread); ballThread.setTwin(ballItem); ballThread.start(); waiting(); ballItem.click(); waiting(); ballItem.click(); waiting(); // exit ballThread.stopMe(); } private static void waiting() throws Exception { Thread.sleep(750); } } java-design-patterns-1.9.0/twin/src/main/java/com/iluwatar/twin/BallItem.java000066400000000000000000000013321264154357600271230ustar00rootroot00000000000000 package com.iluwatar.twin; /** * This class represents a Ball which extends {@link GameItem} and implements the logic for ball * item, like move and draw. It hold a reference of {@link BallThread} to delegate the suspend and * resume task. */ public class BallItem extends GameItem { private boolean isSuspended = false; private BallThread twin; public void setTwin(BallThread twin) { this.twin = twin; } @Override public void doDraw() { System.out.println("doDraw"); } public void move() { System.out.println("move"); } @Override public void click() { isSuspended = !isSuspended; if (isSuspended) { twin.suspendMe(); } else { twin.resumeMe(); } } } java-design-patterns-1.9.0/twin/src/main/java/com/iluwatar/twin/BallThread.java000066400000000000000000000020321264154357600274320ustar00rootroot00000000000000 package com.iluwatar.twin; /** * This class is a UI thread for drawing the {@link BallItem}, and provide the method for suspend * and resume. It hold the reference of {@link BallItem} to delegate the draw task. * */ public class BallThread extends Thread { private BallItem twin; private volatile boolean isSuspended; private volatile boolean isRunning = true; public void setTwin(BallItem twin) { this.twin = twin; } /** * Run the thread */ public void run() { while (isRunning) { if (!isSuspended) { twin.draw(); twin.move(); } try { Thread.sleep(250); } catch (InterruptedException e) { throw new RuntimeException(e); } } } public void suspendMe() { isSuspended = true; System.out.println("Begin to suspend BallThread"); } public void resumeMe() { isSuspended = false; System.out.println("Begin to resume BallThread"); } public void stopMe() { this.isRunning = false; this.isSuspended = true; } } java-design-patterns-1.9.0/twin/src/main/java/com/iluwatar/twin/GameItem.java000066400000000000000000000005541264154357600271270ustar00rootroot00000000000000 package com.iluwatar.twin; /** * GameItem is a common class which provides some common methods for game object. */ public abstract class GameItem { /** * Template method, do some common logic before draw */ public void draw() { System.out.println("draw"); doDraw(); } public abstract void doDraw(); public abstract void click(); } java-design-patterns-1.9.0/twin/src/test/000077500000000000000000000000001264154357600203135ustar00rootroot00000000000000java-design-patterns-1.9.0/twin/src/test/java/000077500000000000000000000000001264154357600212345ustar00rootroot00000000000000java-design-patterns-1.9.0/twin/src/test/java/com/000077500000000000000000000000001264154357600220125ustar00rootroot00000000000000java-design-patterns-1.9.0/twin/src/test/java/com/iluwatar/000077500000000000000000000000001264154357600236425ustar00rootroot00000000000000java-design-patterns-1.9.0/twin/src/test/java/com/iluwatar/twin/000077500000000000000000000000001264154357600246235ustar00rootroot00000000000000java-design-patterns-1.9.0/twin/src/test/java/com/iluwatar/twin/AppTest.java000066400000000000000000000003211264154357600270420ustar00rootroot00000000000000package com.iluwatar.twin; import org.junit.Test; /** * * Application test * */ public class AppTest { @Test public void test() throws Exception { String[] args = {}; App.main(args); } } java-design-patterns-1.9.0/twin/src/test/java/com/iluwatar/twin/BallItemTest.java000066400000000000000000000027311264154357600300220ustar00rootroot00000000000000package com.iluwatar.twin; import org.junit.Test; import org.mockito.InOrder; import static org.mockito.Mockito.inOrder; import static org.mockito.Mockito.mock; import static org.mockito.Mockito.verify; import static org.mockito.Mockito.verifyNoMoreInteractions; /** * Date: 12/30/15 - 18:44 PM * * @author Jeroen Meulemeester */ public class BallItemTest extends StdOutTest { @Test public void testClick() { final BallThread ballThread = mock(BallThread.class); final BallItem ballItem = new BallItem(); ballItem.setTwin(ballThread); final InOrder inOrder = inOrder(ballThread); for (int i = 0; i < 10; i++) { ballItem.click(); inOrder.verify(ballThread).suspendMe(); ballItem.click(); inOrder.verify(ballThread).resumeMe(); } inOrder.verifyNoMoreInteractions(); } @Test public void testDoDraw() { final BallItem ballItem = new BallItem(); final BallThread ballThread = mock(BallThread.class); ballItem.setTwin(ballThread); ballItem.draw(); verify(getStdOutMock()).println("draw"); verify(getStdOutMock()).println("doDraw"); verifyNoMoreInteractions(ballThread, getStdOutMock()); } @Test public void testMove() { final BallItem ballItem = new BallItem(); final BallThread ballThread = mock(BallThread.class); ballItem.setTwin(ballThread); ballItem.move(); verify(getStdOutMock()).println("move"); verifyNoMoreInteractions(ballThread, getStdOutMock()); } }java-design-patterns-1.9.0/twin/src/test/java/com/iluwatar/twin/BallThreadTest.java000066400000000000000000000044771264154357600303440ustar00rootroot00000000000000package com.iluwatar.twin; import org.junit.Test; import static java.lang.Thread.UncaughtExceptionHandler; import static java.lang.Thread.sleep; import static org.mockito.Matchers.any; import static org.mockito.Matchers.eq; import static org.mockito.Mockito.mock; import static org.mockito.Mockito.timeout; import static org.mockito.Mockito.verify; import static org.mockito.Mockito.verifyNoMoreInteractions; import static org.mockito.Mockito.verifyZeroInteractions; /** * Date: 12/30/15 - 18:55 PM * * @author Jeroen Meulemeester */ public class BallThreadTest { /** * Verify if the {@link BallThread} can be resumed */ @Test(timeout = 5000) public void testSuspend() throws Exception { final BallThread ballThread = new BallThread(); final BallItem ballItem = mock(BallItem.class); ballThread.setTwin(ballItem); ballThread.start(); verify(ballItem, timeout(2000).atLeastOnce()).draw(); verify(ballItem, timeout(2000).atLeastOnce()).move(); ballThread.suspendMe(); sleep(1000); ballThread.stopMe(); ballThread.join(); verifyNoMoreInteractions(ballItem); } /** * Verify if the {@link BallThread} can be resumed */ @Test(timeout = 5000) public void testResume() throws Exception { final BallThread ballThread = new BallThread(); final BallItem ballItem = mock(BallItem.class); ballThread.setTwin(ballItem); ballThread.suspendMe(); ballThread.start(); sleep(1000); verifyZeroInteractions(ballItem); ballThread.resumeMe(); verify(ballItem, timeout(2000).atLeastOnce()).draw(); verify(ballItem, timeout(2000).atLeastOnce()).move(); ballThread.stopMe(); ballThread.join(); verifyNoMoreInteractions(ballItem); } /** * Verify if the {@link BallThread} is interruptible */ @Test(timeout = 5000) public void testInterrupt() throws Exception { final BallThread ballThread = new BallThread(); final UncaughtExceptionHandler exceptionHandler = mock(UncaughtExceptionHandler.class); ballThread.setUncaughtExceptionHandler(exceptionHandler); ballThread.setTwin(mock(BallItem.class)); ballThread.start(); ballThread.interrupt(); ballThread.join(); verify(exceptionHandler).uncaughtException(eq(ballThread), any(RuntimeException.class)); verifyNoMoreInteractions(exceptionHandler); } }java-design-patterns-1.9.0/twin/src/test/java/com/iluwatar/twin/StdOutTest.java000066400000000000000000000023041264154357600275470ustar00rootroot00000000000000package com.iluwatar.twin; import org.junit.After; import org.junit.Before; import java.io.PrintStream; import static org.mockito.Mockito.mock; /** * Date: 12/10/15 - 8:37 PM * * @author Jeroen Meulemeester */ public abstract class StdOutTest { /** * The mocked standard out {@link PrintStream}, required since some actions don't have any * influence on accessible objects, except for writing to std-out using {@link System#out} */ private final PrintStream stdOutMock = mock(PrintStream.class); /** * Keep the original std-out so it can be restored after the test */ private final PrintStream stdOutOrig = System.out; /** * Inject the mocked std-out {@link PrintStream} into the {@link System} class before each test */ @Before public void setUp() { System.setOut(this.stdOutMock); } /** * Removed the mocked std-out {@link PrintStream} again from the {@link System} class */ @After public void tearDown() { System.setOut(this.stdOutOrig); } /** * Get the mocked stdOut {@link PrintStream} * * @return The stdOut print stream mock, renewed before each test */ final PrintStream getStdOutMock() { return this.stdOutMock; 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New operations can * be added without altering the node interface. *

    * In this example there is a unit hierarchy beginning from {@link Commander}. This hierarchy is * traversed by visitors. {@link SoldierVisitor} applies its operation on {@link Soldier}s, * {@link SergeantVisitor} on {@link Sergeant}s and so on. * */ public class App { /** * Program entry point * * @param args command line args */ public static void main(String[] args) { Commander commander = new Commander(new Sergeant(new Soldier(), new Soldier(), new Soldier()), new Sergeant( new Soldier(), new Soldier(), new Soldier())); commander.accept(new SoldierVisitor()); commander.accept(new SergeantVisitor()); commander.accept(new CommanderVisitor()); } } java-design-patterns-1.9.0/visitor/src/main/java/com/iluwatar/visitor/Commander.java000066400000000000000000000005741264154357600306020ustar00rootroot00000000000000package com.iluwatar.visitor; /** * * Commander * */ public class Commander extends Unit { public Commander(Unit... children) { super(children); } @Override public void accept(UnitVisitor visitor) { visitor.visitCommander(this); super.accept(visitor); } @Override public String toString() { return "commander"; } } java-design-patterns-1.9.0/visitor/src/main/java/com/iluwatar/visitor/CommanderVisitor.java000066400000000000000000000006071264154357600321570ustar00rootroot00000000000000package com.iluwatar.visitor; /** * * CommanderVisitor * */ public class CommanderVisitor implements UnitVisitor { @Override public void visitSoldier(Soldier soldier) {} @Override public void visitSergeant(Sergeant sergeant) {} @Override public void visitCommander(Commander commander) { System.out.println("Good to see you " + commander); } } java-design-patterns-1.9.0/visitor/src/main/java/com/iluwatar/visitor/Sergeant.java000066400000000000000000000005671264154357600304470ustar00rootroot00000000000000package com.iluwatar.visitor; /** * * Sergeant * */ public class Sergeant extends Unit { public Sergeant(Unit... children) { super(children); } @Override public void accept(UnitVisitor visitor) { visitor.visitSergeant(this); super.accept(visitor); } @Override public String toString() { return "sergeant"; } } java-design-patterns-1.9.0/visitor/src/main/java/com/iluwatar/visitor/SergeantVisitor.java000066400000000000000000000005721264154357600320230ustar00rootroot00000000000000package com.iluwatar.visitor; /** * * SergeantVisitor * */ public class SergeantVisitor implements UnitVisitor { @Override public void visitSoldier(Soldier soldier) {} @Override public void visitSergeant(Sergeant sergeant) { System.out.println("Hello " + sergeant); } @Override public void visitCommander(Commander commander) {} } java-design-patterns-1.9.0/visitor/src/main/java/com/iluwatar/visitor/Soldier.java000066400000000000000000000005621264154357600302730ustar00rootroot00000000000000package com.iluwatar.visitor; /** * * Soldier * */ public class Soldier extends Unit { public Soldier(Unit... children) { super(children); } @Override public void accept(UnitVisitor visitor) { visitor.visitSoldier(this); super.accept(visitor); } @Override public String toString() { return "soldier"; } } java-design-patterns-1.9.0/visitor/src/main/java/com/iluwatar/visitor/SoldierVisitor.java000066400000000000000000000005731264154357600316550ustar00rootroot00000000000000package com.iluwatar.visitor; /** * * SoldierVisitor * */ public class SoldierVisitor implements UnitVisitor { @Override public void visitSoldier(Soldier soldier) { System.out.println("Greetings " + soldier); } @Override public void visitSergeant(Sergeant sergeant) {} @Override public void visitCommander(Commander commander) {} } java-design-patterns-1.9.0/visitor/src/main/java/com/iluwatar/visitor/Unit.java000066400000000000000000000006061264154357600276100ustar00rootroot00000000000000package com.iluwatar.visitor; /** * * Interface for the nodes in hierarchy. * */ public abstract class Unit { private Unit[] children; public Unit(Unit... children) { this.children = children; } /** * Accept visitor */ public void accept(UnitVisitor visitor) { for (Unit child : children) { child.accept(visitor); } } } java-design-patterns-1.9.0/visitor/src/main/java/com/iluwatar/visitor/UnitVisitor.java000066400000000000000000000003651264154357600311720ustar00rootroot00000000000000package com.iluwatar.visitor; /** * * Visitor interface. * */ public interface UnitVisitor { void visitSoldier(Soldier soldier); void visitSergeant(Sergeant sergeant); void visitCommander(Commander commander); } java-design-patterns-1.9.0/visitor/src/test/000077500000000000000000000000001264154357600210315ustar00rootroot00000000000000java-design-patterns-1.9.0/visitor/src/test/java/000077500000000000000000000000001264154357600217525ustar00rootroot00000000000000java-design-patterns-1.9.0/visitor/src/test/java/com/000077500000000000000000000000001264154357600225305ustar00rootroot00000000000000java-design-patterns-1.9.0/visitor/src/test/java/com/iluwatar/000077500000000000000000000000001264154357600243605ustar00rootroot00000000000000java-design-patterns-1.9.0/visitor/src/test/java/com/iluwatar/visitor/000077500000000000000000000000001264154357600260575ustar00rootroot00000000000000java-design-patterns-1.9.0/visitor/src/test/java/com/iluwatar/visitor/AppTest.java000066400000000000000000000003031264154357600302760ustar00rootroot00000000000000package com.iluwatar.visitor; import org.junit.Test; /** * * Application test * */ public class AppTest { @Test public void test() { String[] args = {}; App.main(args); } } java-design-patterns-1.9.0/visitor/src/test/java/com/iluwatar/visitor/CommanderTest.java000066400000000000000000000007771264154357600315020ustar00rootroot00000000000000package com.iluwatar.visitor; import static org.mockito.Matchers.eq; import static org.mockito.Mockito.verify; /** * Date: 12/30/15 - 19:45 PM * * @author Jeroen Meulemeester */ public class CommanderTest extends UnitTest { /** * Create a new test instance for the given {@link Commander} */ public CommanderTest() { super(Commander::new); } @Override void verifyVisit(Commander unit, UnitVisitor mockedVisitor) { verify(mockedVisitor).visitCommander(eq(unit)); } }java-design-patterns-1.9.0/visitor/src/test/java/com/iluwatar/visitor/CommanderVisitorTest.java000066400000000000000000000007171264154357600330540ustar00rootroot00000000000000package com.iluwatar.visitor; import java.util.Optional; /** * Date: 12/30/15 - 18:43 PM * * @author Jeroen Meulemeester */ public class CommanderVisitorTest extends VisitorTest { /** * Create a new test instance for the given visitor */ public CommanderVisitorTest() { super( new CommanderVisitor(), Optional.of("Good to see you commander"), Optional.empty(), Optional.empty() ); } } java-design-patterns-1.9.0/visitor/src/test/java/com/iluwatar/visitor/SergeantTest.java000066400000000000000000000007701264154357600313360ustar00rootroot00000000000000package com.iluwatar.visitor; import static org.mockito.Matchers.eq; import static org.mockito.Mockito.verify; /** * Date: 12/30/15 - 19:45 PM * * @author Jeroen Meulemeester */ public class SergeantTest extends UnitTest { /** * Create a new test instance for the given {@link Sergeant} */ public SergeantTest() { super(Sergeant::new); } @Override void verifyVisit(Sergeant unit, UnitVisitor mockedVisitor) { verify(mockedVisitor).visitSergeant(eq(unit)); } }java-design-patterns-1.9.0/visitor/src/test/java/com/iluwatar/visitor/SergeantVisitorTest.java000066400000000000000000000007001264154357600327070ustar00rootroot00000000000000package com.iluwatar.visitor; import java.util.Optional; /** * Date: 12/30/15 - 18:36 PM * * @author Jeroen Meulemeester */ public class SergeantVisitorTest extends VisitorTest { /** * Create a new test instance for the given visitor */ public SergeantVisitorTest() { super( new SergeantVisitor(), Optional.empty(), Optional.of("Hello sergeant"), Optional.empty() ); } } java-design-patterns-1.9.0/visitor/src/test/java/com/iluwatar/visitor/SoldierTest.java000066400000000000000000000007611264154357600311670ustar00rootroot00000000000000package com.iluwatar.visitor; import static org.mockito.Matchers.eq; import static org.mockito.Mockito.verify; /** * Date: 12/30/15 - 19:45 PM * * @author Jeroen Meulemeester */ public class SoldierTest extends UnitTest { /** * Create a new test instance for the given {@link Soldier} */ public SoldierTest() { super(Soldier::new); } @Override void verifyVisit(Soldier unit, UnitVisitor mockedVisitor) { verify(mockedVisitor).visitSoldier(eq(unit)); } }java-design-patterns-1.9.0/visitor/src/test/java/com/iluwatar/visitor/SoldierVisitorTest.java000066400000000000000000000006771264154357600325550ustar00rootroot00000000000000package com.iluwatar.visitor; import java.util.Optional; /** * Date: 12/30/15 - 18:59 PM * * @author Jeroen Meulemeester */ public class SoldierVisitorTest extends VisitorTest { /** * Create a new test instance for the given visitor */ public SoldierVisitorTest() { super( new SoldierVisitor(), Optional.empty(), Optional.empty(), Optional.of("Greetings soldier") ); } } java-design-patterns-1.9.0/visitor/src/test/java/com/iluwatar/visitor/StdOutTest.java000066400000000000000000000023071264154357600310060ustar00rootroot00000000000000package com.iluwatar.visitor; import org.junit.After; import org.junit.Before; import java.io.PrintStream; import static org.mockito.Mockito.mock; /** * Date: 12/10/15 - 8:37 PM * * @author Jeroen Meulemeester */ public abstract class StdOutTest { /** * The mocked standard out {@link PrintStream}, required since some actions don't have any * influence on accessible objects, except for writing to std-out using {@link System#out} */ private final PrintStream stdOutMock = mock(PrintStream.class); /** * Keep the original std-out so it can be restored after the test */ private final PrintStream stdOutOrig = System.out; /** * Inject the mocked std-out {@link PrintStream} into the {@link System} class before each test */ @Before public void setUp() { System.setOut(this.stdOutMock); } /** * Removed the mocked std-out {@link PrintStream} again from the {@link System} class */ @After public void tearDown() { System.setOut(this.stdOutOrig); } /** * Get the mocked stdOut {@link PrintStream} * * @return The stdOut print stream mock, renewed before each test */ final PrintStream getStdOutMock() { return this.stdOutMock; } } java-design-patterns-1.9.0/visitor/src/test/java/com/iluwatar/visitor/UnitTest.java000066400000000000000000000031051264154357600305000ustar00rootroot00000000000000package com.iluwatar.visitor; import org.junit.Test; import java.util.Arrays; import java.util.function.Function; import static org.mockito.Matchers.eq; import static org.mockito.Mockito.mock; import static org.mockito.Mockito.verify; import static org.mockito.Mockito.verifyNoMoreInteractions; /** * Date: 12/30/15 - 18:59 PM * * @author Jeroen Meulemeester */ public abstract class UnitTest { /** * Factory to create new instances of the tested unit */ private final Function factory; /** * Create a new test instance for the given unit type {@link U} * * @param factory Factory to create new instances of the tested unit */ public UnitTest(final Function factory) { this.factory = factory; } @Test public void testAccept() throws Exception { final Unit[] children = new Unit[5]; Arrays.setAll(children, (i) -> mock(Unit.class)); final U unit = this.factory.apply(children); final UnitVisitor visitor = mock(UnitVisitor.class); unit.accept(visitor); verifyVisit(unit, visitor); for (final Unit child : children) { verify(child).accept(eq(visitor)); } verifyNoMoreInteractions(children); verifyNoMoreInteractions(visitor); } /** * Verify if the correct visit method is called on the mock, depending on the tested instance * * @param unit The tested unit instance * @param mockedVisitor The mocked {@link UnitVisitor} who should have gotten a visit by the unit */ abstract void verifyVisit(final U unit, final UnitVisitor mockedVisitor); }java-design-patterns-1.9.0/visitor/src/test/java/com/iluwatar/visitor/VisitorTest.java000066400000000000000000000044041264154357600312230ustar00rootroot00000000000000package com.iluwatar.visitor; import org.junit.Test; import java.util.Optional; import static org.mockito.Mockito.verify; import static org.mockito.Mockito.verifyNoMoreInteractions; /** * Date: 12/30/15 - 18:59 PM * * @author Jeroen Meulemeester */ public abstract class VisitorTest extends StdOutTest { /** * The tested visitor instance */ private final V visitor; /** * The optional expected response when being visited by a commander */ private final Optional commanderResponse; /** * The optional expected response when being visited by a sergeant */ private final Optional sergeantResponse; /** * The optional expected response when being visited by a soldier */ private final Optional soldierResponse; /** * Create a new test instance for the given visitor * * @param commanderResponse The optional expected response when being visited by a commander * @param sergeantResponse The optional expected response when being visited by a sergeant * @param soldierResponse The optional expected response when being visited by a soldier */ public VisitorTest(final V visitor, final Optional commanderResponse, final Optional sergeantResponse, final Optional soldierResponse) { this.visitor = visitor; this.commanderResponse = commanderResponse; this.sergeantResponse = sergeantResponse; this.soldierResponse = soldierResponse; } @Test public void testVisitCommander() { this.visitor.visitCommander(new Commander()); if (this.commanderResponse.isPresent()) { verify(getStdOutMock()).println(this.commanderResponse.get()); } verifyNoMoreInteractions(getStdOutMock()); } @Test public void testVisitSergeant() { this.visitor.visitSergeant(new Sergeant()); if (this.sergeantResponse.isPresent()) { verify(getStdOutMock()).println(this.sergeantResponse.get()); } verifyNoMoreInteractions(getStdOutMock()); } @Test public void testVisitSoldier() { this.visitor.visitSoldier(new Soldier()); if (this.soldierResponse.isPresent()) { verify(getStdOutMock()).println(this.soldierResponse.get()); } verifyNoMoreInteractions(getStdOutMock()); } }